Hi Chips, this can be fixed quite easily
Basically, the only way to really turn them off is to uninstall them.
However, you don't need to do that. If you want to System Restore, then simply do it from Safe Mode. Spam F5 as your PC boots, until you get a screen that says "pick an operating system to boot" then press F8 and select "Safe Mode" (NOT any of the "with networking" etc. just Safe Mode) and do the system restore from there.
Neither your AV or your Firewall will start in Safe Mode, so they can't interfere.