When I shutdown windows,  it just restart again and again..What's wrong w/ my PC?
112486
It could be many things.... start by disconnecting  your Hard Drive... if it still restarts and does not let you stay in the bios try a new Power Supply... if persist its most likely your motherboard... make sure to disconnect  everything else...
857132
it happened with me also one time dont worry about it\nits software problem\nif it repeat itself all the time then reinstall ur windows
829275
http://support.microsoft.com/search/default.aspx?catalog=LCID%3D1033&spid=global&query=windows+restarts+unexpectedly&adv=&mode=r&cat=False\n\nTry the above link. The answer is given by Microsoft.\n\nI SURE WISH PEOPLE WOULDN"T ANSWER A QUESTION THEY KNOW NOTHING ABOUT. (See all the above answers)
1115328
shut down and return?\nOr leave your computer on and return? It could be a whole host of problems. Thats not enough information to really go on.
856207
do a complete wipe and reload after backing up your files because what you did was put 2 copys of windows on top of each other when one wasnt working
1134378
Right click on My Computer icon> properties>Click on Advance Tab>Down at the bottom find Start up and System Recovery> hit the settings> uncheck---Under System Failure----Automatically Restart..\nThat should take care of it temporarily.\nU might wanna rebuilt your PC from scratch...U might have some other serious issues which is causing it.\nGood Luck.
233511
Restarting of computer on its own can be due to:\n1. Loose RAM, just insert it again in the slot...\n2. Capacitor on motherboard is burnt...get it repaired\n3. any virus which affect the boot area.... clean it
602765
mine did that. all u do is shut down ur computer and then give it a few hrs and then reboot it. mine was ok.
238020
Shut down your computer and wait a little bit and then restart to see if this will fix the problem;usually it does.
1014756
Probably because of an anti-virus program. Disable it before shutting down. Enable it again on startup.
349962
you might have a virus, that happened to me. i made a backup and reinstalled windows. or, you could try an antivirus program, like nortons.
637403
All programs have to shut down before the computer can shut down.I sounds like you have alot of programs running in the background.You can go to the start menu and click on run,when the box comes  up that says open,Type msconfig and click ok.Now a box with several tabs will appear,click on the one that says start up.Now you can uncheck allexcept the ones that say windows system or kbd for the keyboard,now click apply then close and restart computer.When computer restarts,a box may appear that you can check to never show this again.If this does not help,then I would suggest that you have a memory or ram issue and the computer needs to be serviced by a professional.\n\nGood luck and I hope this helps you
1102249
when i get probs like that i just start from fresh if your pc works the same as mine just restart comp and pressf8 or f11 continuously and follow instructions.only problem with this is it wipes everything off.ie .security downloads etc so will have to put all back on but its like having a new comp but make you got discs you need first .good luck.allways works 4 me.
1043605
Check to see if a virus exists on your system.  This can be a very probable cause to this problem.  If it persists after that, contact either your computer manufacturer, or do a complete reboot (reinstall) of Windows.
658450
your pc is over heating that is why it is rebooting itslef and in due course it is damaging your software...\n\nIn short u have a hardware problem.\n\nwhat u must do ?\n\n1)check the temperature of your pc.\n2)check your fans.\n\nu must call a hardware expert and must install your OS again.
750197
This happens when closing previous windows session abruptly.\n\nOnce a week the following maintenance jobs are  a must\n\n1) Scan to fix the errors\n\nDouble click 'My computer' icon on the desktop - select the drive or disk - right click mouse - select properties - open tools tab - under scan, press check now button. - select fix errors automatically\n\nAfter this, restart.\n\nBefore opening windows, it will scan in dos mode to fix the errors.\n\n2) Disk Defragmenter\n    Press Start - All Programs - Accessories - System tools - DiskDefragmenter\n\n3) Disk cleanup\n  Press Start - All Programs - Accessories - System tools - DiskCleanup\n\nThe above three will help you to maintain the sytem properly.
1175218
Try removing programs that you don't use. There may be something shutting down in the background that you don't know is running. Also get a good spy-ware removal software such as Spyware Doctor. There could be hundreds of little spy programs running without your knowledge. When Windows shuts down it must first shut down all of the programs that you have running.