First, don't ever load anything like "driver sweeper" into your system.
Windows needs NOTHING to work properly. Avoid all free "tools" from the internet.
You are just asking for problems when you install stuff "free" from the internet.
Sign in as administrator (If you are not administrator you may be blocked)
Close all the applications that are being used...save and close your files...
Turn Off the antivirus and firewall, turn off the functions of windows defender.
For more you can refer to this site.
http://www.tomshardware.com/forum/388897-33-graphics-card-detected-installing-drivers