Have a 2nd Account on Your Windows Operating System

Make sure UAC is enabled to ensure the popup appears each time you're about to install something. It's a great idea to have a 2nd account on your Windows PC by going to Control Panel, Accounts, and Users, and then add a new user. 

You will probably want to make one of them an "admin" account, while more actively using the standard account. In case one account gets messed up, you can use the other one.