ok:
1 - first create a new folder on your desktop - call it "trend"
2 - download and save this in the folder:
http://dk.trendmicro-europe.com/ente...rt/pattern.php
3 - extract the file and save it in the "trend" folder
4 - download this and save it in the "trend" folder
http://www.trendmicro.com/download/dcs.asp
5 - Disable "system restore" by rightclicking your "my computer" icon and choose "properties" (remember to enable that again later)
6 - reboot in failsafe (you do that by pressing F8 while booting)
Then you can choose "failsafe with network" - do that
7 - then it boots up - enter the "trend" folder and doubleclick the "sysclean.com" file, and let it do its thing
If that dont fix it, it might just be malware, then download this to remove it
http://www.ewido.net/en/download/