When Im typing in facebook, lately , all of a sudden this pc just restarts.. screen goes black and it restarts... then ie exp

[BonnieJean]

Lately , like in the last week or two, it just restarts in the middle of whatever I am doing. checking the fan... and will clean it out.. but its been recently cleaned and scanned numerous times.. I should at least get a warning screen or something....

 

[Darkbreeze]

What is the model number of your PC, or your system specs including motherboard, power supply, CPU, graphics card, etc, if it's a custom build?

Sounds very much like it's a power supply or driver issue.