Hello
I'm sorry to hear that you're experiencing this issue. Since you're using Windows 7, it's possible that the issue is related to outdated drivers or software. I recommend that you try updating your graphics card drivers and any other drivers that may be related to your computer's hardware. You can also try running a system file checker scan to check for any corrupted system files. To do this, open the Command Prompt as an administrator and type "sfc /scannow" without the quotes. If the issue persists, you may want to consider upgrading to a newer version of Windows, as Windows 7 is no longer supported by Microsoft and may not receive security updates or bug fixes.
Best Regards,
Hania Lian