Pros: Works, depending on your graphics card.
Cons: Can flip resolution upside down, depending on your graphics card.
Other Thoughts: @davpow, if you knew a little bit about using a computer, you'd know you can just hit Ctrl+Alt+Up on nearly all rigs to rotate the display back to the way it was supposed to be.
You didn't "need" to use system restore, you chose to due to ignorance. In the future, consider looking up troubleshooting via Google before deciding you need to use system restore. It'll be faster, even if you're reading it upside down.