|See response 2 in this - try cleaning the contacts on the ram modules, and making sure the modules are properly seated:|
For a laptop, or netbook, you must remove both its main battery and AC adapter before you do that.
For a brand name computer, see the Owner's or User's manual if you need to - how to remove or replace the ram is usually in that - it may already be in your installed programs. If you can't get into Windows, it may be on a disk that came with the computer, or you can go online and look at it or download it - it's in the downloads for your specific model.
For a generic desktop computer, see the mboard manual if you need to - how to remove or replace the ram is usually in that.
Check your hard drive with the manufacturer's diagnostics.
See the latter part of response 1 in this:
If you don't have a floppy drive, you can get a CD image diagnostic utility from most hard drive manufacturer's web sites, but obviously you would need to make a burned CD, preferably a CD-R for best compatibility, on another computer if you need to.
Seagate's Seatools will test any brand of hard drive.
Do the long test.
The bootable Dos versions of SeaTools can be used even if Windows is not working properly.
If the hard drive itself tests okay, any data problems found can be fixed, one way or another.
If the hard drive itself tests okay.........
Re-installing Windows,or running the brand name system's Recovery procedure, is a LAST RESORT ! Usually there is some way of fixing your problem other than doing that, but you've already messed up the data on the drive by starting the process .
You NEVER try to re-install Windows, or running the brand name system's Recovery procedure, when you're not sure if your system is working properly !
Try booting from the CD again.
You may have no problems this time.
If you DO, there is probably something else wrong with your computer !
Failing power supplies are common and can cause your symptoms !
An overheated CPU can cause your symptoms ! The most common cause of that is there is too much dust and lint on the CPU fan and heat sink.