My C Drive missing after boot from floppy

Your 10 tips for fixing XP boot seems logical.
My C drive has crashed after probably infected with Sysinfoserv.exe and Myrvc.exe…..there was also bootex.log. I removed these using ERD Commander bootable CD. Before this,
It sceamed vulgar…and displyed abusive text…..(Your computer has been F***KKED”…that sort….and repeatedly reboots and does not to C:. Tried booting through floppy….no use Can’t transit from Drive A: to C:….it says “Invalid Drive”
From Recovery console :
C:fixboot [drive]
C:fixmbr [devicename]
Thanks for tips. I will try these and come back .The PC is not with me now at this hour.

Thanks.