Thanks for your recent message or call
Please try the following steps to fix your issue
Create your own Windows account with Admin rights
Graphics Card/GPU drivers.
If Windows files or drivers have become corrupted it will be necessary to repair windows files. This a quite a simple step by step process.
If this fails to resolve the issue for you the next step is reinstalling Windows
After the install has completed successfully, make sure Windows Updates are fully updated and that you are using the very latest drivers for your GPU.
If these steps don't work please let us know.