Registry After Windows Update And Registry Optimization Tool

While windows was uploading some updates yesterday, I cleaned my registry using Iolo's system mechanic tool and that's where the problems started. (I already read and understood your message: don't use those tools and stay out of your registry. A lesson I learned too late, unfortunately.)My computer rebooted and after a couple of minutes I noticed the message: " failure configuring windows features reverting changes ". I managed to bypass this loop by running in safe mode and recover my computer to a restore point in the past. This only worked partially: I get windows to run in normal mode but I get this message: "system failed while restoring the registry from the restore point. Restore point damaged or was deleted during restore". So it didn't restore but I can get into my windows now.So I don't get the 'reverting change loop' anymore, so I can access my computer but what's the mess? Well my computer is slow as hell.Like mentioned above, I already looked around on this forum and wrote down what I already tried. [code] My computer is terrible slow because of a registry defrag/optimization of a registry tool (in combination with windows update) --> I need to find a way to get back my old registry files but system recovery ain't working.