Okay, a couple of things. First, NEVER allow Windows Update to install drivers. You should only obtain drivers from the websites of the individual hardware manufacturers. But in this case you say that happened after the bsod's started, so let's try a couple of standard troubleshooting steps before moving on to more complicated ones.
1) To check the ram, download memtest (
http://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.
2) Hard Drive Diagnostics:
http://www.tacktech.com/display.cfm?ttid=287 Make sure you select the tool which is appropriate for the brand of your hard drive.
Depending on the program, it'll create bootable floppy, or bootable CD.
If downloaded file is of .iso type, use ImgBurn: http://www.imgburn.com/ to burn .iso file to a CD (select "Write image file to disc" option), to make the CD bootable.
For Toshiba drives, see here: http://sdd.toshiba.com/main.aspx?Path=ServicesSupport/FujitsuDrivesUSandCanada/SoftwareUtilities#diagnostic
3) Please run full system scans with BOTH your installed anti virus app and with MalwareBytes
4) You said this just started last weekend. Do you have a disc image you can restore from before that date if needed? How about system restore? For now, I just want to know - please don't do anything before running the troubleshooting steps above.
