Windows vista reinstall

[JJ2000]

I was going to re-install windows vista n a Dell PC infected with virus. Would it be OK to reformat the C drive first by using the DOS command FORMAT C: at the DOS prompt and then boot up from the original Windows Vista DVD that came with the PC?

 

[badge]

Why not boot to the Vista install disk, format and install.

 

[JJ2000]

The virus is preventing me from booting to the Vista install disk. So, if I reformat, it should clean out the virus, and then leave the install disk in the DVD drive, and re-start, the PC should boot from the install disk. Right?

 

[badge]

In BIOS, the first boot device must be set to the DVD. Not sure it is.