I have a antec 300 case ,3 hard drives,3case fans,4830 video card,7750 cpu(no OC),Asus m4a78 pro mobo,450 watt psu. it ran fine until recently when i start Utorrent it runs 5 mins then reboots.My os is on a seperate drive than the download drive(which is a WD JB 120) 4 years old .Gaming runs fine(Batman Arkham) ,maybe the drive is about to die? Or the psu is struggling ? I need professional help.Thanks guys.
To see if your drives are ok, go to the control pannel, administrative tools and event viewer. There click on System. If you see any warnings or errors and the sourve is Disk, then yup, there are some problems on your HDD. It may not be a physical error. Maybe a format would fix them.
Scan for viruses, make sure you only have 1 version of Java installed...