like i said guys, it only occurs when i attempt to use wallmarket, theres no other problems and my powersupply is at full
It could be that there is a problem with the memory addressing in your windows setup. When Wallmarket tries to use a certain amount of memory, the computer doesn't like it at all and shuts down. I had this problem with extended photoshop use on my dell laptop...
I then lost my windows install to a virus and had to reinstall everything... since then it works fine.
It could also be that the Wallmarket is somehow overtaxing your processor, and thus causing an immediate shutdown....
It could also be an overheating problem. If using wallmarket causes your internals to heat up drastically (not necessarily something you will be able to feel) it may force shutdown in order to save the computer from permanent damage.
Make sure you are running nothing but the necessary programs when you use wallmarket. (IE, if wallmarket doesn't need any other programs, only run wallmarket)
For all I know, it could also just be a bad chip on your built in RAM... Any number of things could cause a crash like you describe... I'm still fixing my PC since a similar issue happened... as it turns out, my motherboard was fried by a power surge, and it shortly thereafter ruined my powersupply via feedback surges... this was all due to lightning and not software...