I have a compaq 5310us 5000 series.. Running windows Xp.. it kept crashing at desktop when it first gets to desktop. I rebooted it up and now it says Bios Error 01 Hard Disk hit any key when I hit a key it says the same thing. I took out the cmos battery for 8 hrs. In cmos settings it says the Ide dps self test failed. When I run the test it finds my harddrive. I save settings reboot and then it goes back to saying Bios error again.