1) When virus attack computer, I hope it would first attack the c: drive
( which is the booting drive, i.e. the active drive ). and the browser is generally in the c: drive.

Does it affect other drive also?

In that CASE is there any way to save other drives (drives that are not set as active) from being attacked by the virus ( i.e any protection or encryption?)??

2) Can viruse damage h disk surface?

1) Use antivirus, antispyware & firewall.
2) No.There are numerous variants of virii out there that can attach/infect any drive on your system except CD drives.
They can hide/migrate and be transferred WITHOUT you KNOWING to drives/folders removable media etc.

The more sophisticated the protection programs BECOME the more sophisticated the virii writers become...

Take fed's advice.

patio. Quote

2) Can viruse damage h disk surface?

In that case is there any way to save other drives (drives that are not set as active) from being attacked by the virus ( i.e any protection or encryption?)??

Yes. Don't be stupid.