Sudden messed up computer display

I hope this is the right place to post this. Anyways, today I was playing Rollercoaster Tycoon 3 when all of a sudden teh game froze and then there was like light blue flashing over the game, I couldn't do anything, the entire computer froze. I waited a bit then held down the power button of my computer and it restarted.When it was back I went on to a different game, an MMORPG which I was on only just last night and everything was fine but the momnt I got on to the actual game it went like kinda really white with red lines everywhere and once again everything crashed and didn't respond then my monitor went to sleep and wouldn't come back on, so once again I restarted. I then noticed on this second restart that the display was all messed up, there were all these lines all over the place, coloured bars, black lines even a bunch of 'A's randomly dotted around the screen, I restarted and it still had the lines so I switched everything off by the mains then when I started it up I did a system restore. It then worked fine until I made the mistake of thinking that I could go back on to RCT3 again. Got through to the loading of the actual game with no problems then everything messed up again so I just forced it to shut off by holding the button but instead it restarted itself and the display is still completely messed up! I will take a picture in a second and post it, I'm posting from a different computer right now since my one is now trying to repair the startup. Anybody know at all what is going on? Is it because of my drivers or anything? It's a HP computer, I'll go find out which model if needed and it's got Windows Vista 32bit on it. It had been previously restord to factory condition where it messed up a little and now updates can't be installed, will I have to restore to factory condition again? Oh and any other info I need to post?

 

Just took pictures to explain what I'm talking about:

http://i48.tinypic.com/301gjlv.jpg
http://i50.tinypic.com/b55dus.jpg
http://i45.tinypic.com/iz3gyf.jpg

 

what are you running
video card brand and model
cpu
m/board
ram
power supply
brand
model
wattage

check the listings in the bios for 12v line voltages and temperatures and post them


is it the same in safe mode

in the device manager uninstall the video card
reboot tapping f8 and choose low resolution mode
when windows finishes rebooting
disable a/virus
install your drivers
reboot the computer

 

Thanks for the response. RAM is 4000MB, model is HP Pavillion A6442.uk. I tried to find out the rest but the screen was so messed up I could barely read anything on there. When I did go into safe mode yesterday, yes it worked fine but now I'm not sure how ot get back into safe mode.

 

see if you can borrow a 80+ quality 450w or better to try in it

it is pcie the min i run in pcie is 550w yours comes with a 300w

to get into safe mode tap the f8 key to get to the boot options menu with safe on it