I would do several things
1. Download and run hijack this
http:\\tomcyote.org/hjt. Post a logfile up here
2. Go to
CCleaner.com download and run C cleaner but do not run the registry cleaner. This will clean out temporary files and make the scans faster.
3. GO to the following sites in this order none of these have to be downloaded they are all online scanners.
Pandasoftware and run activescan it is an online virus scanner save a report when it is done scanning.
Panda Software. Protection against viruses, Spyware, Spam and other Internet threats
Trend Micro Housecall
Trend Micro - Free online virus Scan
Bitdefender - WORD OF CAUTION you need to change the default so that it is not selected to automatically delete if it cannot disinfect. some viruses will infect crtitical windows system files and if this option is selected it may delete files it shouldn't even though they are infected. but if this is the case please post the filesnames and location up here
AntiVirus - AntiSpam - Firewall Software, Data Security, Free Protection
Symantec - run their online security scanner for viruses.
Symantec Corp.
Once that is done do the following
Download and run the following programs they can coexist and are free
Ad-Aware @ Lavasoft - The Original Anti-Spyware Company - Lavasoft -Adaware 1.06 Personal Edition this will scan and remove spyware and adware
The home of Spybot-S&D! - SPybot seek and destroy same function as above
ewido - anti-spyware and anti-malware solutions - Ewido anti spyware same as above
CWShredder - Defeat CoolWebSearch - Download CWShredder Free -download coolweb shredder
finally
4. Run Rootkit revealer
RootkitRevealer v1.71 see if it finds anything if it does and it is suspicious then post the result here and we can look at it further
Once all this is done you have a clean bill of health and then we can look at optimizing the PC by disbaling unecessary unwated services.