bobnix, welcome. Please print this out and follow ALL these directions carefully.
The system is infected with Backdoor.OptixPro.13.C
by the presence of system.exe http://securityresponse.symantec.com/avcen...ixpro.13.c.html
Looks like you are also a victim of the latest CoolWebSearch (CWS) hijack.
Download the latest v1.98.2 version of HijackThis to post your log here:http://aumha.org/downloads/hijackthis.exe
These infections disable the infection removal.
Make sure 'show all files' is enabled:http://service1.symantec.com/SUPPORT/tsgen...=&osv=&osv_lvl=
Boot into Safe Mode
by tapping F8
key repeatedly at bootup.
More detailed instructions here:http://service1.symantec.com/SUPPORT/tsgen...001052409420406
Find and delete if still present:C:/WINDOWS/SYSTEM/system.exe
Reboot and Install the prevention protection below and help your friends from being infected on the Internet.
Empty the Recycle Bin frequently.
Run CleanUp! as the Temp folders should be cleaned out periodically as installation programs and hijack programs leave a lot of junk there.http://cleanup.stevengould.org/
Then reboot to let it clean out what it found.
By the way, in order to improve Internet Explorer (IE) performance the Temporary(TIF)should be cleaned out periodically.
Also, it is a good idea to limit the size of the TIF to 200MB for performance sake.
In IE go to Tools then Internet Options then Settings and move the slider down to 200MB.
Download and install WinPatrol.http://www.winpatrol.com
Browser settings for increased security:http://bshagnasty.home.att.net/browsersettings.htm
Install IE-SPYAD then run the install.bat in the ie-spyad folder and SpywareBlaster then keep them up to date
as today's Internet is full of nasty infections.https://netfiles.uiuc.edu/ehowes/www/resource.htm#IESPYADhttp://www.javacoolsoftware.com/spywareblaster.html
You should install ALL WindowsCritical Updates
to help from being continually infected.
In Internet Explorer go to Tools then Windows Updates and install each patch one by one rebooting when necessary.