Running programs appear minimized in taskbar but will not open

When I open one of my programs, I can see the icon appear in the task bar, but when I click on it to be able to use it, it doesn't open. I can see other programs being highlighted when I click the specific icon for the problem icon, but it never comes forward.

I can however click the icon, use Alt + Space, and select maximize and it will function as normal, but as soon as I click the "restore down" button, it acts up again. I've ran sfc /scannow and it seemed to fix the issue for a few minutes, but then acts the same way again. Typically it is one application (AS400), which I have completely uninstalled and reinstalled to no avail, but also happens seemingly random to other programs such as notepad, firefox, and IE.

Thanks in advance.

That did the trick. Thanks for the help!