Ethernet is gone after using a system restore point?

I could not start my laptop in normal mode or in safemode with networking instead i just got a blue screen and then the computer reset itself. Safe mode without networking DID work though.

I used the recovery disc I made when I got the laptop and I used a restore point that was made automaticly at the beginning of this month (when I installed a game) to fix the solution.

Now my laptop boots up fine in normal mode. however, I cannot seem to connect to my internet connection via the ethernet cable I use when playing online games. But i CAN connect to the internet via my wireless router. So it seems that my ethernet driver was uninstalled or something.

What can I do to fix this?

My laptop is an Acer Aspire notebook. windows 7.