Restoring your computer replaces all of the original drivers that were present when the computer was manufacturer. However, those drivers might be older versions which is what is preventing your webcam from working properly with MSN. Visit Samsung's support site and download new, updated drivers for your laptop. Also make sure you apply all of the Windows updates that have come out since that laptop was made.
As for the screen blur, you probably just need to adjust the resolution to the screen's native resolution, which is 1366 x 768. This should clear up that blurry effect you're getting.