Problem finally solved as usual after reformatted PC. I supposed to do partition backup image restore but stuff is missing after hdd error.
after spent 1 day and all stuff fixed
-format and fresh installed win7
-installed drivers
-installed all required softwares
-update to service pack 1
-installed backup software
-backup system drive to image to 2 different hdd
-created bootable USB drive disk (for restore backup in future)
-create restore point in PC
In future, if virus malware attach registry, can restore from Restore Point; If hdd failure or severe virus infected PC, then backup image restore. Peace of mind