Windows logoff option bar not showing and computer is slow

Hi I was wondering if I could have some help with an annoying problem i'm having. Sometimes when I turn my gaming computer on, windows runs strangely slow and the bar which has the options such as Logoff, Lock, Restart ect. only shows a border of the panel. If i put my mouse over the bar it brings up what the option does but doesn't actually have it as a button.
I put a photo of what the problem does to the power related options bar.

Hope you can help

Thanks Josh

Run SFC /SCANNOW Command, update or reinstall the Display driver, test your RAM and work through the other Troubleshooting Steps for Windows 7.

I have done those scans, i have done anti virus scans, i have done defrags, but i haven't done the display driver, i'll try that now.

it's seemed to have worked, thanks :)

Good news.

You can work through the other Troubleshooting Steps to go over WIn7 thoroughly and become more familiar with its resources. Establishing a Clean Boot can improve performance.