I'm not entirely sure if this is the right section for this but I'm hoping someone can help me.
My aunt owns a Compaq Presario SN1000 desktop which had windows XP pre-installed on it. The computer was infected with a virus (I don't know which one unfortunately) and in order to recover data from the machine someone saw fit to attempt to reinstall windows. However when they could not get the recovery cd to work they used a cd from a Dell machine and have activated that copy of windows. (I'm assuming its that copy as the desktop has dell solutions folders etc).
System messages inform that currently windows is unstable as some required system files have been deleted (I assume this was done to remove the virus infection).
They want to competely reformat the PC and have asked me to help, but I'm not sure where to begin. I can't seem to boot from the actual HP recovery CD, even when I select the CD drive as the first place to boot from. Instead the system just continues to load windows as normal.
I have also tried pressing F10 on start up and nothing happens.
Any suggestions would be greatly appreciated as I have no idea what to try.