Firstly update and run your anti-virus product. You can also run a free online scan as well as some malware can actually corrupt or disable your resident security products. Here are a few online scans you can run:
Trend - http://housecall.trendmicro.com/
Panda - http://www.pandasoftware.com/products/ActiveScan.htm
Norton - http://security.symantec.com/sscv6/default.asp?langid=ie&venid=sym
Second download, update and run scans using the following products:
SuperAntispyware
http://superantispyware.com/
Spybot S&D (free version requires manual updating)
http://www.safer-networking.org/en/download/
AVG AntiSpyware
http://free.grisoft.com/doc/20/lng/us/tpl/v5
Adaware from Lavasoft (free version requires automatic updating)
http://www.lavasoftusa.com/products/ad-aware_se_personal.php
(These programs can be run in Safe Mode after downloading and updating)
Third, after cleaning your system, disable System Restore, reboot and re-enable System Restore when you log back on. This will clear the malware that may still be lurking in System Restore, which could be reinstalled should you need to rollback at some point. Additionally, a reboot may be required to complete the malware removal process.
Lastly, you may also want to install the following tool. It is free and requires you to check for and enable updates manually once a week or so. It uses no system resources.
SpywareBlaster (inoculates, not a spyware removal tool)
http://www.javacoolsoftware.com/spywareblaster.html
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If you cannot get it removed after the above, you may want to join a tech group that specializes in providing manual instructions on malware eradication.
Free technical help forums
AumHa Forums
http://aumha.net/index.php
Bleeping Computers
http://www.bleepingcomputer.com/forums/
Spybot S&D Forums
http://forums.spybot.info/
Lavasoft Forums
http://www.lavasoftsupport.com/
Spyware Info Forums
http://forums.spywareinfo.com/index.php?showtopic=79038
GeekstoGo
http://www.geekstogo.com/forum/forums.html
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After all that, you may need to run SFC.
If your computer comes up clean after running your resident security products, you may want to consider running a System File Checker (SFC). This can be run in Safe Mode should you prefer. To get into Safe Mode either hold down or tap the F8 key repeatedly while the computer is starting up. To run SFC, close all applications such as Office, Messenger, Email, etc, and go to:
- Start
- Run
- Type in sfc /scannow (include the space before the " / ")
What SFC does is that it attempts to fix or replace critical operating system files. Sometimes this can be done without the installation disk, however it may prompt you for the appropriate operating system installation disk. If that is the case, then you know that you definitely have major file corruption or something missing. Insert the disk if prompted. Also you should run SFC using the Administrator account.
If you have the Vista operating system, the steps are a bit different due to the UAC. See the link below.
http://vistasupport.mvps.org/system_file_checker.htm
Don't surf, play games or do anything while SFC runs. After it is completed, reboot your computer.
One of the major culprits in missing or corrupt operating system files is running a registry cleaner or optimizer. They can flag important shared files for deletion or cleanup. Another cause is malware.
NOTE: Before running any registry cleaner or editing the registry, always ensure you back it up first. If the registry cleaner you are using doesn't have that function, you can do it manually. http://support.microsoft.com/kb/322756