I have a dell dimension 5150 running windows xp and about a year ago I started to get blue screen errors and had to replace the hard drive. Starting about a month ago I started getting a blue screen with many different error messages....page fault in non paged area, kernal stack inpage error, kernal data inpage error, etc....which i did a dskchk/f each time and it seems to recover. It seemed to occur when i went into ie so i switched to google chrome but I am still getting blue screens when running different programs about once a day and i have to reboot the computer. Everything is running very slow coming up the first time I go into the application. It seems like the hard drive is searching or running a lot before anything comes up on the screen. Usually once I run the app the first time and relaunch it the same day it comes up much quicker. I've done a virus search with avast and I tried to do a hard drive diagnositic with software i downloaded from western digital but it ran for about 8 hours and finally went to blue screen. Please help.