1) What is new or different since the last time everything worked properly (ie, new hw, new sw, virus, error, etc)?
2) Go to System Properties - Advanced - Startup & Recovery Settings and uncheck "Automatically Restart". If the reboots are caused by bsod's the blue screen will remain up next time. Post the entire contents of that screen. Alternatively, if you can do the following please do:
unzip downloaded file and double click on BlueScreenView.exe to run the program.
when scanning is done, go to EDIT - Select All
Go to FILE - SAVE Selected Items, and save the report as BSOD.txt
Open BSOD.txt in Notepad, copy all of the content, and paste it into your next reply