New Computer Randomly Crashing Especially When Loading Discs

[Jaaay]

Hi there, i have a problem with a new-ish computer, purchased/built in june. Its a work pc, so pretty basic:

AMD Athlon II X2 Dual Core 250 3.00GHz

MSI GF615M-P33 GeForce 6150SE

OCZ Platinum 4GB (2x2GB) DDR3 PC3-10666C7 1333MHz Dual Channel Kit

OcUK Swift 450W Silent Power Supply

A 250gb sata hard drive

IDE DVD drive

Running Windows 7 Ultimate x64 SP1

Basically, its slow all the time, used to freeze a lot, updated the nvidia graphics drivers, helped a bit, but still freezes when trying to load from discs, also hangs a lot, and doesnt identify USB sticks.

When clicking to start the MSI drivers dvd from My Computer freezes and displays a white background with black diagonal lines.

I then thought i've had enough, reinstalled windows, now im trying to access the same dvd, but its freezing and throwing up a white background with bluey thick diagonal lines.

I've tried running 1 stick of ram, same thing happens with both of them, the problem is still there.

I also ran Prime for half an hour, nothing happened there, no unexpected rebooting or anything.

I'm just stuck as to what to do now, i hope someone can help.

Thanks in advance.

 

[Jaaay]

is the PSU likely to cause the problems? Obviously from a business point of view its just used to send emails, write letters, excel etc, nothing hugely labour intensive, so the cheapest option looked the best.

 

[Jaaay]

Bump, can anyone shed any light? Ive built two more machines with more or less the same specification, just with gigabyte motherboards, could it be the msi motherboard causing the problem?

 

[Jaaay]

dont really use the disc drive to be fair, had to reinstall windows 7 from a USB, its just generally slow and freezes up quite a lot, programs not responding etc, surely it shouldn't do that? its not exactly slow, 3.0ghz dual core, 4gb ram, what more does it need!