Well, I only see a few recent blue screens and not more than one in any day, but okay. First thing I'd suggest is that you uninstall PC Tools. It seems to be causing a problem. Then I'd suggest checking the ram and the hd.
To check the ram, download memtest (http://www.memtest.org/
). Burn it to a cd using a dedicated .iso burning utility (http://www.petri.co.il/how_to_write_iso_files_to_cd.htm
), make sure the cd drive is at the top of the boot order in bios, then boot to the newly created cd and run the utility.
To run checkdisk, right-click on a command prompt icon and open as administrator. In the command prompt window type:chkdsk /r (then press ENTER). You'll be told the disk is in use and asked if you want to run checkdisk on the next boot. Say yes, exit the command prompt window, and reboot.