hey, i leave my pc on overnight to downloads games and stuff cause i got slow internet but recently when i leave it on overnight when i wake up my pc is off i dont know when or why it turns off it just does.

• Edited by David WoltersModerator Friday, March 28, 2014 5:00 AM removed profanity

Check your power plan.

Renee

Check your system event logs as well, unless it's environmental, and something within Windows is shutting it off, there could be a record of exactly what is causing the shutdown. 

When you restart, are you prompted that there was an unexpected shutdown and given an option to start in safe mode?  That would indicate something environmental (power outage), overheating, something like that.  If not, Windows or some running process or application is shutting it down.

Does it say resuming Windows?  That's power plan related, and by default, Windows will sleep after 20 or 30 minutes I believe while on AC power.

1. Make sure that overheating is not your case.

2. Make sure that power management is not involved here.

3. Hope you has not set overclocking

4. Test your memory (memtest) and HDD (with HDD vendor's diagnostics tools)

You are given too few information for reasonable and detailed advice. The more we will have important information, the faste may the solution concerge to good results.

Regards

Milos