If you just want to repair the mbr to boot windows, check your hard drive manufactureres website for disk utilities.

I use Seagate drives and have downloaded DiscWizard and Seatools, both as bootable floppy and as bootable cds (iso's provided) many times (for updates).

There is an option (in Seatools I think) to "fix" the mbr.

As for Linux, you should always make a boot floppy just in case Windows screws things up.

master_b