I've installed Memtest on a USB drive and went in the BIOS to use the boot override so that it boots the USB drive instead of the OS drive, but the OS is still the one that is booted first. Do you know why ?
Ok cool.. I'm unsure as to why the USB method won't work for you although other users have said the same thing before now. Sometimes a user will have a problem running from either disk or usb but not both so it's worth trying the disk method.
I take it you've had no bsod's since running the scan? If that's the case I wouldn't bother running memtest86 unless you bsod again.
Well I didn't have any BSOD since the chkdsk but it happens randomly, so sometimes I don't have any BSOD for 2 or 3 days, then it happens again.
So I'm still going to run the memtest just in case it comes from the memory.