Old55, his sig says Win 7 64 bit. But, the original problem, after inserting the memory was the 5 beeps at PC power on, which is an error report from the Power On Self Test (POST), which is an "RTC Clock Failure". At that point it will not boot up or even load the BIOS. Its not an OS problem at that point as its not even getting to the point to access the hard drive and load (or try to load) the OS. If this is still the problem, reloading the OS, which is not needed, is impossible.