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Suddenly very slow Firefox/downloads


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#1 flojo

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Posted 30 July 2009 - 11:26 AM

A couple days ago I noticed that the download speed of my computer, and the speed with which Firefox was opening web pages, slowed down considerably. I usually use Avast (the free version) and was not alerted to anything by it; I scanned my computer using Spybot and Malwarebytes, and these didn't find anything either. Please help!

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#2 ThunderZ

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Posted 30 July 2009 - 11:33 AM

Are you running the latest vers. of Firefox?
Have you installed any add-ons to FF?
Are all downloads slow or only from one site?

#3 flojo

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Posted 30 July 2009 - 11:42 AM

Downloads slow for all sites, not just one.
No FF add-ons.

I am running Firefox 3 (not 3.5 - takes forever to download...)

#4 ThunderZ

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Posted 30 July 2009 - 12:02 PM

What type of connection are you on. Cable\DSL\Dial-up?

#5 flojo

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Posted 30 July 2009 - 12:29 PM

University dorm connection - ethernet cable; 100Mbps, usually very fast. Nothing was changed about the connection in the last few days, and my laptop works just fine on it.

#6 ThunderZ

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Posted 30 July 2009 - 12:37 PM

Sounds like a LAN problem. Nothing may have changed on your PC but who knows what the University IT Dept. may have done. Any one else complaining about slow speeds?

#7 flojo

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Posted 30 July 2009 - 12:57 PM

No, as I wrote before, this is not a LAN problem, as my laptop works fine, both in wireless mode and when connected to the same ethernet cable.

#8 ThunderZ

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Posted 30 July 2009 - 01:06 PM

In this instance I am using LAN to refer to the University\dorm network.

#9 flojo

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Posted 30 July 2009 - 01:11 PM

I know - the university/dorm network works just fine - I can connect to the internet at normal (high) speeds using my laptop, but not my desktop. The issue is with the desktop, not with the network. Can anyone please help with that?

Thanks in advance!

#10 ThunderZ

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Posted 30 July 2009 - 01:15 PM

You did not state in the beginning we were dealing with two different computers and that one seem`d to be operating normally while the other one was`t while using the same connection. Would have saved some time.

#11 DaChew

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Posted 30 July 2009 - 01:42 PM

Is IE slow on the desktop or just Firefox?
Chewy

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#12 flojo

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Posted 30 July 2009 - 01:46 PM

IE is also very slow, unfortunately

#13 DaChew

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Posted 30 July 2009 - 01:52 PM

Read these directions, make sure you have a fully updated MBAM and post a quick scan log

Please download Malwarebytes Anti-Malware (v1.39) and save it to your desktop.
alternate download link 1
alternate download link 2
If you have a previous version of MBAM, remove it via Add/Remove Programs and download a fresh copy.
  • Make sure you are connected to the Internet.
  • Double-click on mbam-setup.exe to install the application.
  • When the installation begins, follow the prompts and do not make any changes to default settings.
  • When installation has finished, make sure you leave both of these checked:
    • Update Malwarebytes' Anti-Malware
    • Launch Malwarebytes' Anti-Malware
  • Then click Finish.
MBAM will automatically start and you will be asked to update the program before performing a scan.
  • If an update is found, the program will automatically update itself.
  • Press the OK button to close that box and continue.
  • If you encounter any problems while downloading the updates, manually download them from here and just double-click on mbam-rules.exe to install. Alternatively, you can update through MBAM's interface from a clean computer, copy the definitions (rules.ref) located in C:\Documents and Settings\All Users\Application Data\Malwarebytes\Malwarebytes' Anti-Malware from that system to a usb stick or CD and then copy it to the infected machine.
On the Scanner tab:
  • Make sure the "Perform Quick Scan" option is selected.
  • Then click on the Scan button.
  • If asked to select the drives to scan, leave all the drives selected and click on the Start Scan button.
  • The scan will begin and "Scan in progress" will show at the top. It may take some time to complete so please be patient.
  • When the scan is finished, a message box will say "The scan completed successfully. Click 'Show Results' to display all objects found".
  • Click OK to close the message box and continue with the removal process.
Back at the main Scanner screen:
  • Click on the Show Results button to see a list of any malware that was found.
  • Make sure that everything is checked, and click Remove Selected.
  • When removal is completed, a log report will open in Notepad.
  • The log is automatically saved and can be viewed by clicking the Logs tab in MBAM.
  • Copy and paste the contents of that report in your next reply and exit MBAM.
Note: If MBAM encounters a file that is difficult to remove, you may be asked to reboot your computer so it can proceed with the disinfection process. Regardless if prompted to restart the computer or not, please do so immediately. Failure to reboot normally (not into safe mode) will prevent MBAM from removing all the malware. MBAM may "make changes to your registry" as part of its disinfection routine. If using other security programs that detect registry changes (ie Spybot's Teatimer), they may interfere or alert you after scanning with MBAM. Please temporarily disable such programs or permit them to allow the changes.

http://www.bleepingcomputer.com/forums/t/114351/how-to-temporarily-disable-your-anti-virus-firewall-and-anti-malware-programs/


Also
Before we start fixing anything you should print out these instructions or copy them to a NotePad file so they will be accessible. Some steps will require you to disconnect from the Internet or use Safe Mode and you will not have access to this page.

Please download DrWeb-CureIt and save it to your desktop. DO NOT perform a scan yet.

Reboot your computer in "Safe Mode" using the F8 method. To do this, restart your computer and after hearing your computer beep once during startup (but before the Windows icon appears) press the F8 key repeatedly. A menu will appear with several options. Use the arrow keys to navigate and select the option to run Windows in "Safe Mode".

Scan with Dr.Web CureIt as follows:
  • Double-click on launch.exe to open the program and click Start. (There is no need to update if you just downloaded the most current version
  • Read the Virus check by DrWeb scanner prompt and click Ok where asked to Start scan now? Allow the setup.exe to load if asked by any of your security programs.
  • The Express scan will automatically begin.
    (This is a short scan of files currently running in memory, boot sectors, and targeted folders).
  • If prompted to dowload the Full version Free Trial, ignore and click the X to close the window.
  • If an infected object is found, you will be prompted to move anything that cannot be cured. Click Yes to All.
  • When complete, click Select All, then choose Cure > Move incurable.
    (This will move any detected files to the C:\Documents and Settings\userprofile\DoctorWeb\Quarantine folder if they can't be cured)
  • Now put a check next to Complete scan to scan all local disks and removable media.
  • In the top menu, click Settings > Change settings, and UNcheck "Heuristic analysis" under the "Scanning" tab, then click Ok.
  • Back at the main window, click the green arrow "Start Scanning" button on the right under the Dr.Web logo.
  • When the scan is complete, a message will be displayed at the bottom indicating if any viruses were found.
  • Click "Yes to all" if asked to cure or move the file(s) and select "Move incurable".
  • In the top menu, click file and choose save report list.
  • Save the DrWeb.csv report to your desktop.
  • Exit Dr.Web Cureit when done.
  • Important! Reboot your computer because it could be possible that files in use will be moved/deleted during reboot.
  • After reboot, post the contents of the log from Dr.Web in your next reply. (You can use Notepad to open the DrWeb.cvs report)

Edited by DaChew, 30 July 2009 - 01:53 PM.

Chewy

No. Try not. Do... or do not. There is no try.

#14 flojo

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Posted 31 July 2009 - 12:47 AM

Hi - thank you for the detailed instuctions, I performed them and the logs are listed below. The internet connections seem faster, but youtube videos and downloads are still very very slow.

MBAM - log immediately after scan:

Malwarebytes' Anti-Malware 1.39
Database version: 2421
Windows 5.1.2600 Service Pack 3

7/30/2009 4:05:40 PM
mbam-log-2009-07-30 (16-05-40).txt

Scan type: Quick Scan
Objects scanned: 94185
Time elapsed: 6 minute(s), 8 second(s)

Memory Processes Infected: 0
Memory Modules Infected: 0
Registry Keys Infected: 5
Registry Values Infected: 0
Registry Data Items Infected: 0
Folders Infected: 0
Files Infected: 2

Memory Processes Infected:
(No malicious items detected)

Memory Modules Infected:
(No malicious items detected)

Registry Keys Infected:
HKEY_CLASSES_ROOT\TypeLib\{df058c45-cd18-453e-8745-5a77f60722ab} (Adware.Gdown) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{b5a33c35-7298-4d15-8753-a2e851e2eab3} (Adware.Gdown) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\Interface\{f0d2b812-752d-4af1-a2fb-968c4d8446db} (Adware.Gdown) -> Quarantined and deleted successfully.
HKEY_CLASSES_ROOT\CLSID\{e856b973-45fd-4559-8f82-eab539144667} (Adware.Gdown) -> Quarantined and deleted successfully.
HKEY_CURRENT_USER\SOFTWARE\Microsoft\cs41275 (Malware.Trace) -> Quarantined and deleted successfully.

Registry Values Infected:
(No malicious items detected)

Registry Data Items Infected:
(No malicious items detected)

Folders Infected:
(No malicious items detected)

Files Infected:
c:\WINDOWS\SYSTEM32\MSINET.oca (Rogue.Trace) -> Quarantined and deleted successfully.
c:\WINDOWS\SYSTEM32\GTDownDE_87.ocx (Adware.Gdown) -> Quarantined and deleted successfully.


DrWeb.cvs log file contents:

RegUBP2b-C:\Documents and Settings\All Users\Application Data\Spybot - Search & Destroy\Snapshots2;Trojan.StartPage.1505;Deleted.;
A0166047.ocx;C:\System Volume Information\_restore{B37680B2-BA0A-4E5D-BF30-83E44C588624}\RP942;Adware.Gdown;Incurable.Moved.;
A0166060.reg;C:\System Volume Information\_restore{B37680B2-BA0A-4E5D-BF30-83E44C588624}\RP942;Trojan.StartPage.1505;Deleted.;

MBAM log after all this showed no infected items, but as I wrote above, while the speed of downloading several pages (gmail, nytimes) seems to have improved, other things that require good connectivity (downloads, youtube) are still infernatlly slow...

So this seems to have taken care of a part of the problem, but not its entirety... Thoughts?

Thanks so much, I really really appreciate what you are doing!

#15 DaChew

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Posted 31 July 2009 - 12:56 AM

Update MBAM, you are way behind, and do a complete scan
Chewy

No. Try not. Do... or do not. There is no try.




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