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No internet connection after adware removal.


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7 replies to this topic

#1 Terubozu

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Posted 22 January 2015 - 02:21 PM

I wonder if someone could help.

I recently have been seeing ads as I'm using the internet on google chrome (probably due to a download from a dodgy source). I ran an adware cleaner which probably did the trick but immediately after the computer restarted, internet access through any browser has not been possible.

I know it is not a router issue as I can access the internet on the iPad I am currently using. Unfortunately I do not have another computer through which I could download any kind of software which might help, so I am pretty much stuck offline.

My computer is windows 7. I have searched around and have tried various cmd prompts suggested but nothing seems to have made any difference.

(This is my first time using this site so if there is something I have missed, please let me know.)

Thanks very much.


Edited by hamluis, 22 January 2015 - 03:19 PM.
Moved from Win 7 to Am I Infected - Hamluis.


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#2 Broni

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Posted 22 January 2015 - 04:44 PM

Welcome aboard p22002758.gif

 

Unfortunately I do not have another computer through which I could download any kind of software

 

How did you post your topic then?


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#3 TheSteeZ

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Posted 22 January 2015 - 05:50 PM

Welcome aboard p22002758.gif
 

Unfortunately I do not have another computer through which I could download any kind of software
 

How did you post your topic then?

In his second paragraph he said he's using his ipad

#4 TheSteeZ

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Posted 22 January 2015 - 05:53 PM

I would start with your network settings. Bottom right where wireless or adaptor icon is right click change network settings then go to ip4 properties and check if your on auto obtain ip address and dns

Sorry I am replying from a mobile device

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#5 quietman7

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Posted 22 January 2015 - 06:15 PM

Internet connectivity problems can occur for a variety of reasons to include corrupted networking software installation, third-party software inserting itself into the network adapter settings, misconfiguration issues with TCP/IP Winsock due to deletion or incorrect removal of software and removal of malware components. Below are some common (but simple) solutions which can help resolve connectivity issues. More advanced users may want to try NetAdapter Repair All In One, the Swiss army knife to fix common networking and winsock issues.

:step1: Sometimes just restarting a computer can restore a sudden lost Internet connection. Other times, the loss may be due to outages and disruptions within your ISP's network or the local tower. If using a satellite even extreme weather can cause a loss ot Internet connection. If rebooting did not restore the connection and there are no issues with your ISP, try to repair your Internet Connection with Windows Network Connection Repair & Troubleshooting Tool.
kb20157-002_en_v4.png.png 
:step2: Reset and renew the IP address.

Press the WINKEY + R keys on your keyboard or click Start > Run and in the Open dialog box, type: cmd
* Click OK or press Enter. A dos Window will appear.
* To change to the ROOT directory (C:\>), at the command prompt type: cd \
* At the command prompt C:\>_, type: ipconfig /release
* Press Enter and reboot your computer.
ipconfig_4a.gif
.
If using Vista/Windows 7/8, use an elevated command prompt.
* Click the Start Orb and in the Search box, type: cmd
* Right-click on cmd.exe and select Run As Administrator (or use Ctrl+Shift+Enter).
* Click Yes if prompted by the User Account Control.

Alternatively, click the Start Orb > All Programs > Accessories, right-click Command Prompt and select Run As Administrator.
* At the command prompt C:\>_, type:ipconfig /release
* Press Enter.
* When the prompt comes back, type: ipconfig /renew
* Press Enter.
* Close the command box and and see if that fixes the connection. No reboot needed. 
:step3: Flush the DNS resolver cache and register.

Press the WINKEY + R keys on your keyboard or click Start > Run and in the Open dialog box, type: cmd
* Click OK or press Enter. A dos Window will appear.
* To change to the ROOT directory (C:\>), at the command prompt type: cd \
* At the command prompt C:\>_, type: ipconfig /flushdns
* Press Enter.
* At the command prompt C:\>_, type: ipconfig /registerdns
* Press Enter.
354x64xflush-dns.jpg.pagespeed.ic.1jsLC-
.
If using Vista/Windows 7/8, use an elevated command prompt.
* Click the Start Orb and in the Search box, type: cmd
* Right-click on cmd.exe and select Run As Administrator (or use Ctrl+Shift+Enter).
* Click Yes if prompted by the User Account Control.

Alternatively, click the Start Orb > All Programs > Accessories, right-click Command Prompt and select Run As Administrator.
* At the command prompt C:\>_, type:ipconfig /release
* Press Enter.
* When the prompt comes back, type: ipconfig /flushdns
* Press Enter.
* You will get a confirmation that the flush was successful.
* At the command prompt C:\>_, type: ipconfig /registerdns
* Press Enter.
* Close the command box.

 
:step4: Most Internet connectivity problems arise out of corrupt Winsock settings due to the installation of a networking software or Malware infestation. This can usually be fixed by resetting the winsock.

Press the WINKEY + R keys on your keyboard or click Start > Run and in the Open dialog box, type: cmd
* Click OK or press Enter. A dos Window will appear.
* To change to the ROOT directory (C:\>), at the command prompt type: cd \
* At the command prompt C:\>_, type: netsh winsock reset
* Press Enter and reboot your computer.
netshcmdprompt.png
.
If using Vista/Windows 7/8, use an elevated command prompt.
* Click the Start Orb and in the Search box, type: cmd
* Right-click on cmd.exe and select Run As Administrator (or use Ctrl+Shift+Enter).
* Click Yes if prompted by the User Account Control.

Alternatively, click the Start Orb > All Programs > Accessories, right-click Command Prompt and select Run As Administrator.
* At the command prompt C:\>_, type:netsh winsock reset
* Press Enter and reboot your computer.

If needed, type these commands, one line at a time, pressing Enter after each.
netsh int ipv4 reset
netsh int ipv6 reset

You can also reset the TCP/IP protocol to its default state with this command, then pressing Enter.
netsh int ip reset 
:step5: In some cases third-party software (good and bad) will insert itself into the network adapter settings. If not removed properly or inadvertantly removed by security tools, loss of connectivity often results.
25e7e385-9327-4f7d-aab0-afa5aaf952ba_49. 
:step6: Check/reset your network settings and Configure TCP/IP to use DNS.
* Go to Start > Control Panel, and choose Network Connections in XP or Network and Sharing Center > View or Manage network connections in Vista/Windows 7.
* Right-click on your default connection, usually Local Area Connection or connection that you want to change, and and choose Properties.
* Double-click on Internet Protocol (TCP/IP) or highlight it and select Properties in XP.
* Click the Networking tab, click either Internet Protocol Version 4 (TCP/IPv4) or Internet Protocol Version 6 (TCP/IPv6) in Vista/Windows 7/8, and choose Properties.
* Under the General tab, write down any settings in case you should need to change them back.
* Select the button that says "Obtain an IP address automatically" or make sure the DNS server IP address is the same as provided by your ISP.
* Select the button that says "Obtain DNS servers automatically".
f598cd96-6bf9-47be-942d-7d0b0afdbd88_47.
.
* If unknown Preferred or Alternate DNS servers are listed, uncheck the box that says "Use the following DNS server address".
* Click OK twice to get out of the properties screen and restart your computer. If not prompted to reboot go ahead and reboot manually.CAUTION: It's possible that your ISP (Internet Service Provider) requires specific DNS settings here. Make sure you know if you need these settings or not BEFORE you make any changes or you may lose your Internet connection. If you're sure you do not need a specific DNS address, then you may proceed.
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#6 Terubozu

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Posted 22 January 2015 - 06:51 PM

Thanks for all your help guys.

Quietman7, thanks, I had tried all the steps you recommended apart from 5 and 6 and I think that was probably the solution.

I actually rang my girlfriend (a technician) just after I posted this and she suggested just restoring the computer to an earlier time. It did work and I am back on the internet (though with all the crap from before still on it and running as slowly as ever) I think now I'll try a clean up again, just much more carefully this time.

 

Honestly thank you so much for your time and help.



#7 Broni

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Posted 22 January 2015 - 06:57 PM

I had a similar case couple of days ago where the computer also lost internet connection after running AdwCleaner.

In that case we had ZeroAccess rootkit infection.

 

Let's run some scans...

 

p22002970.gif Download Security Check from here or here and save it to your Desktop.

  • Double-click SecurityCheck.exe
  • Follow the onscreen instructions inside of the black box.
  • A Notepad document should open automatically called checkup.txt; please post the contents of that document.

NOTE 1. If one of your security applications (e.g., third-party firewall) requests permission to allow DIG.EXE access the Internet, allow it to do so.
NOTE 2. SecurityCheck may produce some false warning(s), so leave the results reading to me.
NOTE 3. If you receive UNSUPPORTED OPERATING SYSTEM! ABORTED! message restart computer and Security Check should run

p22002970.gif Please download Farbar Service Scanner (FSS) and run it on the computer with the issue.
  • Make sure the following options are checked:
    • Internet Services
    • Windows Firewall
    • System Restore
    • Security Center/Action Center
    • Windows Update
    • Windows Defender
    • Other Services
  • Press "Scan".
  • It will create a log (FSS.txt) in the same directory the tool is run.
  • Please copy and paste the log to your reply.


p22002970.gif Please download MiniToolBox and run it.

Checkmark following boxes:
  • Report IE Proxy Settings
  • Report FF Proxy Settings
  • List content of Hosts
  • List IP configuration
  • List Winsock Entries
  • List last 10 Event Viewer log
  • List Installed Programs
  • List Devices (do NOT change any settings here)
  • List Users, Partitions and Memory size
  • List Restore Points

Click Go and post the result.

p22002970.gif Please download Malwarebytes Anti-Malware (MBAM) to your desktop.
NOTE. If you already have MBAM 2.0 installed scroll down.

  • Double-click mb3-setup-1878.1878-3.5.1.2522.exe and follow the prompts to install the program.
  • At the end, be sure a checkmark is placed next to the following:

    • Launch Malwarebytes Anti-Malware
    • A 14 day trial of the Premium features is pre-selected. You may deselect this if you wish, and it will not diminish the scanning and removal capabilities of the program.

  • Click Finish.
  • On the Dashboard, click the 'Update Now >>' link
  • After the update completes, click the 'Scan Now >>' button.
  • Or, on the Dashboard, click the Scan Now >> button.
  • If an update is available, click the Update Now button.
  • A Threat Scan will begin.
  • When the scan is complete, if there have been detections, click Apply Actions to allow MBAM to clean what was detected.
  • In most cases, a restart will be required.
  • Wait for the prompt to restart the computer to appear, then click on Yes.



If you already have MBAM 2.0 installed:

  • On the Dashboard, click the 'Update Now >>' link
  • After the update completes, click the 'Scan Now >>' button.
  • Or, on the Dashboard, click the Scan Now >> button.
  • If an update is available, click the Update Now button.
  • A Threat Scan will begin.
  • When the scan is complete, if there have been detections, click Apply Actions to allow MBAM to clean what was detected.
  • In most cases, a restart will be required.
  • Wait for the prompt to restart the computer to appear, then click on Yes.


How to get logs:
(Export log to save as txt)


  • After the restart once you are back at your desktop, open MBAM once more.
  • Click on the History tab > Application Logs.
  • Double click on the Scan Log which shows the Date and time of the scan just performed.
  • Click 'Export'.
  • Click 'Text file (*.txt)'
  • In the Save File dialog box which appears, click on Desktop.
  • In the File name: box type a name for your scan log.
  • A message box named 'File Saved' should appear stating "Your file has been successfully exported".
  • Click Ok
  • Attach that saved log to your next reply.



(Copy to clipboard for pasting into forum replies or tickets)

  • After the restart once you are back at your desktop, open MBAM once more.
  • Click on the History tab > Application Logs.
  • Double click on the Scan Log which shows the Date and time of the scan just performed.
  • Click 'Copy to Clipboard'
  • Paste the contents of the clipboard into your reply.


p22002970.gifDownload 51a5f31352b88-icon_MBAR.pngMalwarebytes Anti-Rootkit (MBAR) to your desktop.
  • Warning! Malwarebytes Anti-Rootkit needs to be run from an account with administrator rights.
  • Double click on downloaded file. OK self extracting prompt.
  • MBAR will start. Click "Next" to continue.
  • Click in the following screen "Update" to obtain the latest malware definitions.
  • Once the update is complete select "Next" and click "Scan".
  • When the scan is finished and no malware has been found select "Exit".
  • If malware was detected, make sure to check all the items and click "Cleanup". Reboot your computer.
  • Open the MBAR folder located on your Desktop and paste the content of the following files in your next reply:
  • "mbar-log-{date} (xx-xx-xx).txt"
  • "system-log.txt"


NOTE. If you see This version requires you to completely exit the Anti Malware application message right click on the Malwarebytes Anti-Malware icon in the system tray and click on Exit.

p22002970.gif Please download Rkill (courtesy of BleepingComputer.com) to your desktop.
There are 2 different versions. If one of them won't run then download and try to run the other one.
You only need to get one of these to run, not all of them. You may get warnings from your antivirus about this tool, ignore them or shutdown your antivirus.

rKill.exe: http://www.bleepingcomputer.com/download/rkill/dl/10/
iExplore.exe (renamed rKill.exe): http://www.bleepingcomputer.com/download/rkill/dl/11/

  • Double-click on the Rkill desktop icon to run the tool.
  • If using Vista or Windows 7 right-click on it and choose Run As Administrator.
  • A black DOS box will briefly flash and then disappear. This is normal and indicates the tool ran successfully.
  • If not, delete the file, then download and use the one provided in Link 2.
  • Do not reboot until instructed.
  • If the tool does not run from any of the links provided, please let me know.


If normal mode still doesn't work, run the tool from safe mode.

When the scan is done Notepad will open with rKill log.
Post it in your next reply.

NOTE. rKill.txt log will also be present on your desktop.

NOTE Do NOT wrap your logs in "quote" or "code" brackets.
Do NOT use spoilers.
Do NOT edit your reply to post additional logs. Create new reply. I'll not get any email notifications about edits so I won't know you posted something new.


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#8 syedsalmanshah

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Posted 14 October 2017 - 01:24 PM

There can be many reasons for this problem. One of this is, maybe your antivirus software does not support Internet Explorer. Also make sure that your PC has all drivers installed properly.
Another Easiest way for Internet Connection(Check TCP/IP Settings)

Let suppose if you have antivirus software and this method did not work, you need to do turn off the malware programs. For more check Here:

https://techrapidly.com/installed-new-windows-7-unable-connect-internet/






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