I have a dv6000 laptop HP. I turn the power on. It

Hello,

This is usualy called "BDOD" as in "Blue Screen Of Death", more exactly a blue screen containing some error codes, some description of what was going on when it ocurred and a restart signal. You can't see the blue screen for more then a split second because by default the computer is set to restart automaticaly when these errors occur.
Mostly these errors appear as a result of a software modification that alters how windows executes a certain system file. It's actually hard to figure out what does the error means as long as you can't see it. However you could try running an older version of the windows core system registry by System Restore, if you have it enabled (it's on by default). By this we hope to restore the registry to a state prior to this problem.

You can do this by pressing F8 key when the computer is booting up, just before the windows logo appears (or that green bar in vista). When pressed at the right time, this key will bring up a menu on wich you would need to select "most recent settings that worked" or similar - depending on your windows version.

This will instruct windows to load some older registry configuration, one that worked in the past. If you still receive the same error, you could try booting in Safe Mode (again, press F8 but this time select "safe mode") and try unninstalling recent installed aplication, because maybe one of them is causing your problem.

If these steps woun't work, the only clean way to solve the problem would be to reinstall Windows along with your other software programs.

Hope these tips help.
Bogdan