Do you have seperate user accounts set up for you and the other users of your PC? If so, and you have not done so already, try to log in under your main account, or the primary Administrator account and see if that works.
You may also try starting up in Safe Mode, Windows will start up with only the neccessary processes to function normally. To do this, tap F8 repeatedly directly after start-up, and follow the onscreen instructions.
You should consider installing the following software if you have not already done so.
Things you should have - Here are some free, recommended Apps.:
An Anti-Virus Program: AVG Anti-Virus
A Firewall: ZoneAlarm
Spyware/Adware/Malware/etc....:Adaware SESpybot S & DSpywareBlasterSpywareGaurd
Recommended readings:Using Spybot - Search & Destroy to remove Spyware from Your ComputerUsing Ad-Aware SE to remove Spyware & Hijackers from Your ComputerUsing SpywareBlaster to protect your computer from Spyware, Hijackers, and MalwareUsing SpywareGuard to protect your computer from Spyware/Hijackers
The two base protection tools that are pretty much a must these days are an Anti-Virus and a Firewall. If you do not have this protection, I recommend getting them.
Also, you should definately install and run Spybot, and Adaware if you have not already, they may find what is giving you problems.
If none of this works, you should post back, and Im sure that this topic can be moved to the appropriate forum, where you can get advice to use HijackThis, and find out what the trouble is.
Hope this helps,
Edited by nosnhoj#3, 19 March 2006 - 12:40 AM.