Hi there, & Welcome to Tom's Hardware!
The GFxUI has to do with the .Netframework.
If you are running Win-7, might try turning DotNetFrameWork 3.51 off, then reboot, and turn it back on again.
It's found in the Programs and Features dialog, on the left 'Turn Windows Features On and OFf. There you will find Dot Net Framework 3.5.1.
It's been reported to work for some.