Startup Issues with Windows Vista

Hey guys! Can you lend me a hand? Having some serious issues with my
computer...when I turn on my computer, and after loading for a minute or
two on the blue HP screen, it goes STRAIGHT to the System
Startup/Recovery page. I even did the diagnostic scan to see what was
the problem...which it did find one result. It was something called:

"C:\PSHD.dll is corrupt"

This all happened yesterday when my mother bought my little sister The
Sims 3. I let her install it on my computer to play it. (I was at a
friend's house). She basically told me that when she finished installing
it, a pop up screen came up asking if you want to allow the game to come
up or cancel it (pretty normal)--She allowed it. After a few minutes of
playing, the computer suddenly shuts down. Once she turned it back it,
it would always just go straight to the Start up/Recovery page.

And another thing, I was gonna try and just do a system recovery, but I
don't have any flash drives that can hold it all. (I have DVD-Roms but
for some reason it wont show them)

So yeah...I'm on my mother's desktop computer right now. Anyone know
what I can do to save my files from being gone in a deep, dark oblivion?
=( Or just how to just fix the problem?


--
AcrylicSnow