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"Obtain DNS server address automatically" keeps changing to "preferred DNS serve


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#1 BillBauer

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Posted 16 March 2015 - 01:19 AM

Hello, 

 

I have been battling this problem for over a month now. 

 

I lose connection to the internet at random times.  Eventually, I figured out that under TCP/IPv4 Properties, "Obtain DNS server address automatically" is being changed to "User the following DNS server addresses", and then an IP address would be specified for "Preferred DNS server".  When I undo this change and choose "obtain DNS server address automatically", I regain my internet connection.  

 

I tried checking these settings at random times when there is no problem with my internet connection.  Most of the time the setting is unchanged.  But sometimes a Preferred DNS server is specified.  It feels like at those times, my internet speed is slower than usual, but I can't be sure.

 

I have Windows 7.  I tried scanning my computer with Microsoft Security Essentials, but it didn't find anything.

 

When I used HijackThis.  I attempted to fix some entries that didn't look right.  However, when I scan my pc using HijackThis again, it displays all of the entries that it said it fixed the last time. In addition, when I tried clicking "analyze this" in HijackThis, I received an error message that I wasn't connected to the internet (even though I could load websites).

 

You can imagine how grateful I would be if I were to receive any help with this nightmare.

 

Thank you for considering this problem and for reading my message.

 

 

Bill



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#2 boopme

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Posted 19 March 2015 - 02:37 PM

Hello Bill

Run these next and see how it is.

Please download MiniToolBox, save it to your desktop and run it.
Checkmark the following checkboxes:
  • Flush DNS
  • Report IE Proxy Settings
  • Reset IE Proxy Settings
  • Report FF Proxy Settings
  • Reset FF Proxy Settings
  • List content of Hosts
  • List IP configuration
  • List Winsock Entries
  • List last 10 Event Viewer log
  • List Installed Programs
  • List Users, Partitions and Memory size.
  • Click Go and post the result (Result.txt). A copy of Result.txt will be saved in the same directory the tool is run.
    Note: When using "Reset FF Proxy Settings" option Firefox should be closed.
    .
    .
    ADW Cleaner

    Please download AdwCleaner by Xplode and save to your Desktop.
  • Double-click on AdwCleaner.exe to run the tool.
    Vista/Windows 7/8 users right-click and select Run As Administrator.
  • Click on the Scan button.
  • AdwCleaner will begin...be patient as the scan may take some time to complete.
  • After the scan has finished, click on the Report button...a logfile (AdwCleaner[R0].txt) will open in Notepad for review.
  • After reviewing the log, click on the Clean button.
  • Press OK when asked to close all programs and follow the onscreen prompts.
  • Press OK again to allow AdwCleaner to restart the computer and complete the removal process.
  • After rebooting, a logfile report (AdwCleaner[S0].txt) will open automatically.
  • Copy and paste the contents of that logfile in your next reply.
  • A copy of all logfiles are saved in the C:\AdwCleaner folder which was created when running the tool.
  • -- Note: The contents of the AdwCleaner log file may be confusing. Unless you see a program name that you recognize and know should not be removed, don't worry about it. If you see an entry you want to keep, return to AdwCleaner before cleaning...all detected items will be listed (and checked) in each tab. Click on each one and uncheck any items you want to keep (except you cannot uncheck Chrome and Firefox preferences lines).


    .

    thisisujrt.gif Please download Junkware Removal Tool to your desktop.
  • Shut down your protection software now to avoid potential conflicts.
  • Run the tool by double-clicking it. If you are using Windows Vista, 7, or 8; instead of double-clicking, right-mouse click JRT.exe and select "Run as Administrator".
  • The tool will open and start scanning your system.
  • Please be patient as this can take a while to complete depending on your system's specifications.
  • On completion, a log (JRT.txt) is saved to your desktop and will automatically open.
  • Post the contents of JRT.txt into your next message.
  • .
    .
    .
    .
  • Last run ESET.
  • Hold down Control and click on this link to open ESET OnlineScan in a new window.
  • Click the esetonlinebtn.png button.
  • For alternate browsers only: (Microsoft Internet Explorer users can skip these steps)
  • Click on esetsmartinstaller_enu.exe to download the ESET Smart Installer. Save it to your desktop.
  • Double click on the esetsmartinstaller_enu.png icon on your desktop.
  • Check "YES, I accept the Terms of Use."
  • Click the Start button.
  • Accept any security warnings from your browser.
  • Under scan settings, check "Scan Archives" and "Remove found threats"
  • Click Advanced settings and select the following:
  • Scan potentially unwanted applications
  • Scan for potentially unsafe applications
  • Enable Anti-Stealth technology
  • ESET will then download updates for itself, install itself, and begin scanning your computer. Please be patient as this can take some time.
  • When the scan completes, click List Threats
  • Click Export, and save the file to your desktop using a unique name, such as ESETScan. Include the contents of this report in your next reply.
  • Click the Back button.
  • Click the Finish button.
  • NOTE:Sometimes if ESET finds no infections it will not create a log.
  • [/list]

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