First Option: Right click, select "Run As Administrator"
Second Option: If that is a headache, right click, go to properties, then go to the compatibility tab, and down at the bottom there is a checkbox that says "run as administrator" - select it. Now, a little Windows Flag colored shield is on the icon, and it will automatically run as administrator (meaning the UAC pops up, and you have to click continue to run it).
Third Option: If you don't want to deal with UAC at all (which removes plenty of security functions, but stops you from having to deal with all the extra buttons), go to control panel. Then select User Accounts (You may have to click "use classic view" in the top left). The last link on the User Accounts page is "Turn User Account Control on or off" - click it. Then uncheck the box that says "User Account Control is on" or whatever it says. Reboot your machine. Now, everything is an administrator, which can be bad for security concerns, but good for gamers
