This article will explain How To Do Effective System Scanning. Follow these steps:
1) Download One good antivirus (if you don't have any). You can find few good free antivirus here.
2) Download any two good antispywares. You can few good free antispywares here.
3) Update all antivirus and antispywares from respective website.
4) Turn off system restore.
5) Restart system, and boot in safe mode.
6) Now, do full system scan with all antivirus and antispywares one by one.
7) If possible, boot in safe mode with networking. And do full system scan with any online scanner. You can find few very good free online scanner here.
