Preferably AVG :wink:
Just as a matter of caution it’s always good to have a backup of your Master Boot Record (MBR).
there’s a few utilities around, I’ve had success with MBR Fix, so can recommend it.
Download MbrFix:- http://www.sysint.no/Nedlasting/MbrFix.zip

The command to backup MBR is:

MbrFix /drive 0 savembr .
See Pic.
I save the file to my “C” drive and then copy it to a backup disk .
EDIT:
[oops, essex just posted, … if you have a “clean” MBR back it up :wink: ]