Windows 7: BSOD and screen/Machine crashing

Hi, My PC has been running fine for about 6months with no crashes.

Now it has starting to randomly freeze on start-up.

Occasionally the screen will freeze while in use. It has a sort of pixalisation, where it looks like someone has put a kaleidoscope over my monitor. I have attached a jpg to show you what it looks like.

These 2 faults were occurring randomly over the last 2-3 weeks. Earlier today I got a BSOD 0x50

I have attached the dump file from just after the crash.

Any advice would be great. I have a little feeling that the graphics card is dying.

Edit:

Ok I have removed Daemon tools. I have also run the files/programs mentioned in the stickied post. The Perfmon html is enclosed.



I am running Windows 7 Home premium 64bit

Here are the possible causes of a BC 50. I would also note you have one of the largest causes of BSOD's sptd.sys. Please remove it

Resolving a faulty hardware problem: If hardware has been added to the system recently, remove it to see if the error recurs. If existing hardware has failed, remove or replace the faulty component. You should run hardware diagnostics supplied by the system manufacturer. For details on these procedures, see the owner's manual for your computer.

Resolving a faulty system service problem: Disable the service and confirm that this resolves the error. If so, contact the manufacturer of the system service about a possible update. If the error occurs during system startup, restart your computer, and press F8 at the character-mode menu that displays the operating system choices. At the resulting Windows Advanced Options menu, choose the Last Known Good Configuration option. This option is most effective when only one driver or service is added at a time.
Resolving an antivirus software problem: Disable the program and confirm that this resolves the error. If it does, contact the manufacturer of the program about a possible update.

Resolving a corrupted NTFS volume problem: Run Chkdsk /f /r to detect and repair disk errors. You must restart the system before the disk scan begins on a system partition. If the hard disk is SCSI, check for problems between the SCSI controller and the disk.

Finally, check the System Log in Event Viewer for additional error messages that might help pinpoint the device or driver that is causing the error. Disabling memory caching of the BIOS might also resolve it.



Please remove any CD virtualization programs such as Daemon Tools and Alcohol 120%. They use a driver, found in your dmp, sptd.sys, that is notorious for causing BSODs. Use this SPTD uninstaller when you're done: DuplexSecure - Downloads

You can use MagicDisc as an alternative.

Freeware MagicISO Virtual CD/DVD-ROM(MagicDisc) Overview

files attached to original post.

I have removed Daemon Tools, so we will see if I get anymore BSOD's.

I had the screen do the same thing again. Has anyone seen this before or know what could cause it?

I have attached the suggested files to my original post.

Try connecting your computer to a different monitor. TV is fine - as long it has the same video ports as the computer.
Also, open up your computer and see if everything is OK (e.g: no dusts, nothing clogged up, nothing overheating).