<< I used the Windows GUI under Computer -> Properties -> Tools -> Error Checking, with the "Scan for and attept recovery of bad sectors" box checked. >>
Whenever I do that on the drive with the active operating system in -- I multiboot -- I get a message that it can't do the check on the active OS drive and do I want to reboot now or let it do it the next time it reboots ....
Did you not get that? Have you rebooted since invoking that test?