I have Windows XP on my Compaq Presario Model: SR1720IL, which originally came pre-loaded with only DOS on it (And the Windows XP loaded on it is off the same XP CD through which I tried to reboot it for re-installation). Now, somehow certain Spyware came into the PC through Internet even though I had the Cyberdefender running on the PC. Now, due to the spyware the computer got a problem of restarting on running the spyware scan and on opening ebay etc.

So, I decided to reformat the C drive on which Windows XP was running and reinstall it from the CD. So, on rebooting from the CD I pressed ENTER at the "Welcome to Setup" screen and then pressed F8 to agree to the license. Next, there was an option to Repair my existing installation or Install a fresh copy. So, I pressed ENTER to Install a fresh XP. Now, I pressed D to delete the C Drive Partition on which Windows XP was installed then, pressed L to confirm the delete. Later, I pressed C on the un-partitioned space to create the new partition and it already showed the maximum space available so, I pressed ENTER. Then, I chose NTFS to Format the partition. After the format as I pressed enter to go ahead with the installation of Windows XP on C Drive just a few seconds later a Blue screen appeared showing: A problem has been detected and windows has been shut down to prevent damage to your computer.
Page_Fault_In_Nonpaged_Area with the Technical Information: STOP: 0x00000050 (0xE95D5618, 0x00000000, 0x8081882C, 0x00000002)

I wonder why it showed that Windows has been shut down because I had already formatted the C Drive containing the Windows XP and its reinstall was still in process.

Now, later I realized that my system was a FAT32. So, I again did the same procedure and converted it into FAT32 from NTFS but still the same screen appeared and I am unable to install the Windows XP any longer. The system's hardware is absolutely fine because I had started using it a fresh since 2 weeks back only, and it was doing wonderfully well before that spyware came in.

Please help me, what to do next as I have never seen or heard of such an error earlier. Also, I had stored my DATA from C Drive to E Drive how can I access that?

Hi Please... Request....

The Microsoft support page list this as faulty RAM.

http://support.microsoft.com/kb/171003

But since you used this computer 2 weeks ago, its hard to believe, altho not impossible
at all, that the RAM should be faulty.

Instead, I think they may need to be re-seated. Please open your casing, remember to take
anti-static precautions before touching anything inside by touching bare metal. Remove your
RAM block(s) then re-seat them, press them carefully, yet firmly until they click in place.
Maybe look for dust before re-seating them.

If you have more than one block of RAM, you could try run with one of them, swapping them
around if the first one is a no go.

Regards

A wonderful suggestion by Abydos.

You will also want to run the chkdsk /r command using the windows recovery console which you can get to by booting back into your XP installation CD. Bad clusters are a red flag your hard drive may be failing.

Checking the memory and the hard drive for physical damage is first. A blue screen at this stage in the game does, in fact, signal a hardware problem. Most likely the same problem that caused your computer to start rebooting before you tried reformatting the hard drive.