Blue screen of death error messages still occur with Windows even though it is mainly secure.
Windows errors are hard to understand or analyze.
If you're in a position where your system starts to stop, the time has come to start running a few trials, you should find out what is happening.
Do not start reinstalling your operating system, reformatting your hard disc and leaping to the conclusion that your complete system is corrupt. 
There are possibilities that this course of action may cure your problem but the majority of the time that's not the case.
Reformatting your computer should be something to start thinking about when all else has failed, if you have been experiencing blue screen of death error messages.
Rebooting your computer might be the 1st course of action to try. 
It would be a good idea in my opinion to leave it turned off for approximately 1/2 an hour.

Begin Windows defrag program.

If you don't already own a good quality registry cleaner, your built in defragmentation program can do quite a good job at cleaning your hard drive.

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A defrag is quite simple.

1. Go into "all programs" you'll find this in your start menu.
2. Go accessories.
3. You'll now be able to click into system tools and click disc defragmenter.
4. In disc defragmenter window click “analyze".

As soon as analyzing has ended it will inform you as to whether or not you should defragment the volume.
There're many registry cleaners you can get that come with free scans, that do a much better job than a Windows defrag.

Your defrag can take hrs to run.

Try to make sure you don't have work to complete on your PC when you start a defrag run.
Possibly when you're drifting off to bed.
XP tends to misplace files and put them in hard to reach places. If your computer has to get to them quickly it is a little more difficult. The main job a registry cleaner does is place the most frequently used files in faster access areas. Those least used ones get moved to slower areas. The registry cleaner will also collect and throw out all file fragments that are strewn around your hard drive. These include any files that cause your system to freeze.

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Blue screen of death error messages can begin for an assortment of different reasons. It's a real possibility that your PC's ram isn't working correctly. If a failing ram is your issue it will be easily corrected by purchasing another and fitting it in to your systems mother board.

Are there far too many networks competing on your computer at the same time?.

Vast amounts of connections to Internet, office servers or Blue-tooth networks, is likely to pack up your virtual memory space. You could try rebooting after disconnecting from all of your networks. If your system runs a lot smoother when restarted you can be sure the problem was accumulated networks. You will find similar problems as you connect back to all the networks. 
Do not run your printer or blue-tooth networks unless they are required.

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