I will tell about my techniques here.
1.Press ctrl + alt + delete to open windows task manager.
Come process tab and select the checkbox below that says "Show all users..."Look at exe names.If you find a supcious exe there try to close it.
2.Check the regedit
Go start menu>run
write down "regedit" there.
Check HKEY_LOCAL_MACHINE/Software/Microsoft/Windows/CurrentVersion/Run keys with runonce runex too.
If there is something you dont know just delete it.Creators of this hacks may name them like system files so delete all except anti virus,firewalls,required drivers..This will speed up your pc anyways.
3.Check Start Menu>Startup if there is anything just delete it.
4.Check msconfig ; go Start Menu>Run write down "msconfig" come Startup tab and check the application names and paths there , delete all of supcious files like regedit.
5.Always have a good antivirus,antispy and firewall!
You can download some free antivirus softwares at:
http://www.grisoft.com 'avg antivirus
http://www.eset.com 'nod32
You can download ad aware the anti-spy tool from
http://www.lavasoft.com
You can download zone alarm the firewall at
http://www.zonelabs.com
6.Dont take any files from untrusted persons , dont download from untrusted sites.
Dont left your secure.
I hope this will be helpful for our community.All writen by me for smokyhosts.