How to remove admin rights on a Windows 7 computer?

I got a computer from a friend who recently left the country and I no longer have contact with. I am only allowed to use the guest account. I can't download anything because I always need a password and I happen not to know it. It's a Windows 7.

Administrator rights are required whenever you want to download something in your Windows 7 computer. Forgot Windows 7 administrator password? I think you can remove the administrator password using Windows Password Uncloker, sothat you can access your admin account in computer without password and regain admin rights.

Windows Password Unlocker is the most popular tool used to remove forgotten administrator and other user passwords on Windows 7 in a matter of minutes. It also works for Windows 8/Vista/XP/Window servers. 100% safe is guaranteed.

3 simple steps:
Step 1. Download and install Windows Password Unlocker in any PC/Mac.
Step 2. Burn a boot password reset disk with CD/DVD/USB in seconds.
Step 3. Boot the target Windows 7 PC from the boot disk and remove the forgotten Windows 7 administrator password.

Windows Password Unocker is awesome and help reset Windows 7 password in 5 minutes. But if you prefer a free one, you can try the Ophcrack Windows Password Recovery. It’s free but the recovery time depends.