Give your friend the .iso bootable CD file for memtest86+
(1/2-way down the page), and have him assign it as the first boot. Let memtest86+ run, if it completes it passes with no errors, his RAM is working at the voltage, frequencies, and latencies set in the BIOS.
We did a memtest using usb version.It says "test complete no errors.press escape to exit".
does it mean that some other hardware has malfunctioned?or should we try reinstalling windows 7.Also we have placed the ram in the slot previously it was.