You may have a memory issue.
Please download memtest86+
and burn it to a CD. The link is an ISO so you need to use \’Burn image to disk\’ and not just burn the file to a CD. Then reboot your computer and go into the Startup section (probably using F2 when the computer first starts, there should be a message telling you how, this is also called the BIOS) and set your computer to boot from the CDROM. Then put the CD in the drive and boot to it. Run the memory test several times, and then let me know what the results are.