[james...]

Because I'm just lost...

 

[superduckysam]

burn it to a disc then boot from it.

 

[!ender_]

restart, hit delete or f8 and you should get the choice of windows and memtest in bios, select memtest, /profit

if youre looking for a real stability test, use prime95

 

[BinaryBummer]

MEMTEST86

You can download the Memtest ISO form and then burn the ISO (Image) to a CD.
Then be sure you have the BIOS set to boot from CDROM as first boot.
If it still don't boot when set at first boot then disable your Hdrive from 2nd and any other from 3rd device, this will force it to boot from the CD only.
Be sure to change it back when your done.
I could not get any others to work till I mounted it to a CD then it worked perfectly.

 

[KILLER_K]

memtest86, or you using memtest86+?

Either way just burn it to a disk, or use a floppy or a usb jump drive that has bot start up files on it will work.