When i boot my laptop up it comes up to the sign in screen i type in my password and the computer just restarts. Sometimes i get an error message but not enough time to read it before it restarts. If there a way to fix this without reinstalling windows?
If it's not a Windows problem that would be a little more serious. But the first thing to try when first turning on the unit is to press the F8 key right when Windows is starting to load. This will bring you into the Windows startup menu where you can try the last known configuration that worked option to see if that will allow you to reach the desktop. Have you installed anything lately like a update?
i once had this problem but mine was at shutdown, the BSOD was so fast i didn't have time to read,but it was an update problem i had to use the "sfc /scannow" command to get it to work
The problem there is getting to the Run prompt right off of the Start menu in order to run the system file checker tool. Before Windows saw the need to be reinstalled you have a few options available if you have already tried the last known configuration that worked option in the F8 menu.
The first also takes you into the same F8 menu where you manually start the system restore feature from the safe mode /command prompt only option. Once you reach the manual prompt that looks like an old dos prompt you simply type in "
%systemroot%\system32\restore\rstrui.exe " without the quotes and press the enter key to see the first screen appear. You simply follow the onscreen instructions there to bring the system back hopefully priior to the problem being seen. http://support.microsoft.com/kb/304449/
Having booted up in safe mode you can choose to remove the current set of video drivers to see if Windows will then load normally. You would need the driver removal tool for either ATI or NVidia and often found in the software's folder as the main uninstaller. This would remove problem drivers that way before the last step of performing a repair install on Windows itself.
A good article explains how all programs and related folders remain intact while the main system files are reinstalled fresh. Sometimes the video or sound even both sets of drivers are the only thing needing to be installed over again. The article on this is found at http://www.michaelstevenstech.com/XPrepairinstall.htm