So basically, a month ago or so I deleted all my system variables whilst configuring some settings in "Edit system environment variables". I don't exactly remember why, but it has affected a lot of my computer. I can't open .exe files or regedit or task manager. I can't do a system restore or reinstall windows. I can't open sound settings and "Edit environment variables". I saw a post on this website about having to add the system variables manually I truthfully did not understand any of it. I get confused and don't really understand when the term "path" is used so it is very hard for me. Can anyone guide me through this personally? I understand that the adding is different for different specs. My specs are gtx750ti and intel i7 4990. Please help.