Go into WIndows Update>View Update History>Installed Updates and remove the updates which were delivered when the problem happened. Restart.
Was there a display driver
If so and uninstalling the update didn't help, you can then look in Device Manager, click Display Driver>Update tab>Roll back driver.
Next, troubleshoot Aero to recover Aero theme: Control Panel>Troubleshooting>appearance.
MacAfee is considered by most tech enthusiasts to be a bloatware infection. Consider lean mean AV solutions like free Avast or MSE.