Sony Vegas Movie Studio HD 10 Platinum Edition

Whenever I attempt to launch Movie Studio, I get a blue screen of death, and it mentions something is wrong with "stdriver.sys". That file is in my System 32 folder. If I change the extension to "stdriver.sys" to ".BAK", the program runs just fine, though my computer cannot detect my sound card, therefore I can't hear anything at all! If I change the extension back to ".sys", my sound card is detected, but I get the blue screen again!

What I have done:

1. I tried making a copy of "stdriver.sys" (dropping it in another folder), and changed that one's extension to ".BAK". Then I dropped it back into System 32, but it didn't work.
- I also tried this the other way around. No dice.

2. I tried updating all of my drivers, and they're all up to date. I still can't hear anything if the file is called "stdriver.BAK".

3. Changed my WIA to automatic, manual and even disabled it; again, to no avail.

Here are some specs:

Manufacturer: eMachines
Model: ET1331G
Processor: AMD Athlon II X2 235e Processor 2.70 GHz
RAM: 6GB
OS: Windows 7 (64bit)

Any help would be greatly appreciated. Thank you!