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Just a minor problem but it bugs me.. There is this file called karlewsa.exe. I don't know what it is or what it can do. What I know is that it is detected as a virus by prevx. I tried manually deleting it by cmd, the right-click delete thing and even a program "Force delete" but it can't. Whenever I try to delete it, it says "Cannot delete karlewsa.exe. File is being used by another process." or something like that. How can I delete this virus? Note: I think this virus is new.. I search in google... I may be the first victim of this virus.

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Your problem cannot be classified as 'minor': you have probably been infected by a nasty virus.
In order to do this 'manual' delete of karlewsa.exe or nay program that is 'used by another process', you need to:

  • start 'Task manager' (access via keys ctl-alt-del)
  • go to the 'Processes' tab
  • locate the required running process like karlewsa.exe and anything that is related and click on 'End process'
  • locate the directory that has this program and delete the whole directory (you might be required to kill/end additional processes from that directory...)
  • run your up to date Antivirus/Antispyware programs
  • recheck that karlewsa has not regenerated itself again!
Hope the information is helpful and good luck!

ps. The best way to kill any virus is to boot up from a CD containing an up to date antivirus/antispyware utility that has been created on a clean PC.

Posted on Sep 28, 2010

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Hi, I've found that the virus spreads when you plug in any form of removable storage to the affected computer.
I've also found that the Virus can be easily removed from said removable storage when plugged into a Mac; as the hidden folder "OLJA" turns up, which contains the karlewsa executable.
I'm not sure how to remove it from the affected PC, but I hope this helps to prevent the spread of the virus.

Posted on Jan 10, 2011

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