Computer crashes un-expectedly

[Guest]

I recently had a new hard drive installed on my computer to replace my old one...and since then my computer crashes almost every time i use it. Usually it crashes when I watch a DVD in media player or use 3DS MAX. I have re-installed windows and the problem still remains. When it crashes nothing happens, no bluescreen, no error message it just crashes. I have also ran a virus scan and spyware scans and they both came up empty.
Any replies would help.
Thanks.

 

[Kevin]

Is your graphics card up to the task of playing DVD's? Have you checked out
your power supply?

I recently had a new hard drive installed on my computer to replace my old

one...and since then my computer crashes almost every time i use it. Usually
it crashes when I watch a DVD in media player or use 3DS MAX. I have
re-installed windows and the problem still remains. When it crashes nothing
happens, no bluescreen, no error message it just crashes. I have also ran a
virus scan and spyware scans and they both came up empty.

 

[Guest]

Yes i have a fairly new graphics card, what do you mean by checking out my power supply?