Why won't my computer work?

Question

Since last night, whenever i start my computer, it turns on and does the whole loading thing, then it gets a blue screen with:

Stop: c000021a {Fatal System Error}
The Windows Logon system terminated unexpectedly with a status of 0x00000080 (0x00000000 0x00000000).
The system has shut down.

Help would be apreciated.

If it helps, i often download stuff from the internet, and I had just cleared stuff from my computer that i didnt need.. I did check, they were not used/needed

Also, it worked good, even when I had a bunch of stuff on my computer

Answer 1

Ah, the infamous BSOD (blue screen of death)!

Likely cause this time: you erased something (program or data) required for logging in to your Windows operating system. Maybe. In any case, Safe Mode is not an option now. Neither is returning to "the last successful boot" and similar recommendations.

Solution: boot the original Windows installation CD and choose options to repair the hard drive installation. That will check things out and replace the missing files. If successful, all will be as it was (data intact).

Except - these days - you must then repeat almost all "critical updates" on line, and may be faced with either re-registration or challenge of validity of your installation - or both.

Or, install Linux from http://pclinuxos.com or similar, and be done with the instabilities and insecurities of the Redmond product once and for all. Or both.

Dual boot Linux and Windows is great for all that ails you! If you had Linux on your system now, you could boot it and recover or back up your Windows data. In fact, you still can by booting almost any Linux Live CD (see previous paragraph).

Answer 2

You probably accidentally deleted a critical OS file. Call the manufacturer of your computer and ask them what are the steps to re-installing Windows on your PC. If they give you the instructions (I know them, however it would take too long to write them, and it would be LOTS of reading), and you have a Windows disc (should have came with your computer in the event of something like this) and you think you are up to the challenge of re-installing it yourself, go ahead. If you don't feel like doing it, pay the $45-$100 that it will cost to take to the computer shop and have them do it for you.

P.S. Re-Installing Windows will result in the loss of ALL data that was once on your computer!

Answer 3

c000021a refers to your operating system. windows xp etc. Formatting and reinstalling could be your only solution. But try starting in safe mode (press f8 on second loading screen) and choosing the latest restore point.

ps. if your drive is partitioned with a 10gb were only windows exists, you will NOT lose all your data.

Answer 4

You could try troubleshooting in Safe Mode.
Next time you power on, hold down F8 and keep it down until you get an option to select Safe Mode.

From here you can try:
Open My Computer
Right click on C:
click Properties
run an error check

If you are in WinXP and have ever set a "system restore" date, you can return your system to an earlier date when it worked.

Answer 5

You could have still erased something that was connected with something that is used. Did you have an antivirus program that is current and up on the latest viruses and worms? You could have gotten a bug in there that messed with something.

Answer 6

The error message that is listed in the "Summary" section of this article can be caused by a non-maskable problem with your computer hardware, as reported by the hardware abstraction layer. For help with troubleshooting this problem, please contact your computer manufacturer. Sorry its pooched more or less.

Answer 7

just turn ur computer off and then on and see if it works

if not, turn ur computer off, restart, and on the manufacturer logo screen, click f12 or something for startup options and start windows in safe mode...then fix the problem and try normal