System Restore Is MISSING Completely Ultimate 32bit!

I don't even have system restore on my computer! I have tried everything that I've read about on the internet. I did the search, I did the windows+R and typed in rstrui.exe but it says that the program doesn't exist. I'm not extremely knowledgeable about computers but have managed to fix nearly all problems I've had with computers in the past on my own but this is killing me. I ran some stupid Registry First Aid program on the computer and suddenly, a bunch of things on my computer are going wrong.

I cannot access the internet, the computer won't even show that there is a network to connect to, but when I booted my older computer with the same modem and everything, it worked perfectly (that's the one I'm actually using now to post this!) A bunch of applications/programs aren't running properly anymore, even those little side links on the control panel window aren't working (I keep getting popups that say the file/program doesn't exist). It seems a lot of things are not existing on my computer!