Symptoms
1. Poor performance.
2. Unwanted browser behavior.
3. Pop-ups when you aren’t on the Internet.
4. Problems using secure Web sites.
5. Task Manager lists some strange programs like regpd.exe and vgmc.exe. And you can't delete them or they will come back after you delete them.
Resolutions
1. Delete all temp files.
2. Use spyware and adware remover tools.
3. Use regedit and msconfig to clean them.
4. Enable firewall and pop-up blockers.