NvCpl.dll worm xp

Anonymous
2011-12-03T00:25:26+00:00

I have a slow running XP machine.  While troubleshooting, I remove all startup items with msconfig by the disable all button and restarted the machine.

Upon a msconfig a checked MvCpl.dll command line was there.  The original on was also there uncheck.  I searched my C-drive for NvCpl.* and received:

   NvCpl     C:\Windows\Help  Help File

  NvCpl.dll  C:\Windows\System32 

  NvCpl       C:\Dell\Drivers\R65699 Help File

  NvCpl.dll   C:\Dell\Drivers\R65699

  NvCpl       C:\Dell\Drivers\R89437   DL_File

  NvCpl        C:\Dell\Drivers\R89437   HL_File

Bounced around on the internet and learned that a rwiz.exe seem to belong to this worm.  It is also in my msconfig startup page.

Any help with removing this Worm would be appreciated.

Avalonfv

Windows for home | Previous Windows versions | Windows update

Locked Question. This question was migrated from the Microsoft Support Community. You can vote on whether it's helpful, but you can't add comments or replies or follow the question.

0 comments
Answer accepted by question author
Anonymous
2012-01-05T03:06:41+00:00

I just re-read the entire thread. I was struck by two things:

  1. This PC was once on a domain.
  2. This PC had trojans.

I am aware you reconfigured the PC to change it from Domain to Workgroup, but there still might be something in the profile that is searching for something on the domain. I suppose you could create a fresh profile, but I'm not sure I'd waste my time since...

I believe the PC is still compromised. Malware can sometimes be VERY tricky to remove. Sometimes it might APPEAR to be gone, but there will still be a nasty, almost-impossible-to-detect rootkit present (or maybe even a "bootkit" hiding out in the boot sector). The symptoms you describe certainly indicate the presence of malware; the PC might very well be a part of the "botnet" right now.

I recommend that you make sure all the data is backed up and nuke the drive and start from scratch. It's a hassle, but it would probably still be the quickest (and surely be the most effective) way to deal with this mess.

If you had unlimited time and wished to experiment and explore (but I believe you said this PC belongs to a friend), you could search the web for Process Explorer tutorials and start a thread on Bleeping Computer or a similar site to get guided help. But I truly think you'll be better off if you flatten and rebuild.

Good luck and Happy New Year!

Was this answer helpful?

1 person found this answer helpful.
0 comments

42 additional answers

Sort by: Most helpful
Most helpful Newest Oldest
  1. Anonymous
    2011-12-13T21:11:29+00:00

    Daavee,

    Now that AVG has been removed, which antivirus program are you running?

    Microsoft Security Essentials

     

    When you run Task Manager and look at Processes, are there any using unusually large amounts of CPU cycles?

    Yes, always above 85% 

     

    Did you install Windows Search 4.0 (KB940157)?

    No, I must have missed an instruction to do so.

    It's actually good you didn't install Search 4.0. It has led to performance problems on MANY systems. But let's be absolutely sure you don't have it. Click Start | Search. Which window do you see:

    http://www.sizzledcore.com/wp-content/uploads/2008/06/windows-search-40.png

    or

    http://www3.georgetown.edu/uis/images/software/documentation/winxp/search2.gif

    Go back to the Processes tab of Task Manager and sort by CPU cycles in descending order. tell us which processes are the CPU hogs.

    Was this answer helpful?

    0 comments
  2. Anonymous
    2011-12-13T20:43:17+00:00

    Daavee,

    Now that AVG has been removed, which antivirus program are you running?

    Microsoft Security Essentials

    When you run Task Manager and look at Processes, are there any using unusually large amounts of CPU cycles?

    Yes, always above 85% 

    Did you install Windows Search 4.0 (KB940157)?

    No, I must have missed an instruction to do so.

    Avalonfv

    Was this answer helpful?

    0 comments
  3. Anonymous
    2011-12-13T19:42:14+00:00

    Now that AVG has been removed, which antivirus program are you running?

    When you run Task Manager and look at Processes, are there any using unusually large amounts of CPU cycles?

    Did you install Windows Search 4.0 (KB940157)?

    Was this answer helpful?

    0 comments
  4. Anonymous
    2011-12-13T18:57:27+00:00

    Daavee

    Thanks for all of your suggestions and good reading material.

    1.  I used Malwarebytes to scan system. Removed one Trogan.

    2.  Free space in the disk is 33%.

    3.  Malwarebytes is my choice.  Good reading.

    4.  I filled the Dell Inspiron 5150 up with Ram 2GB. The Total and Peak are within your Spec.

    5.  The access mode is still DMA.

    I am loading CCleaner on the machine now.  I will give you feedback on its operation.

    Avalonfv

    Was this answer helpful?

    0 comments