Can't click on start button and programs in taskbar

I have several users using RDS to my Windows Server 2012 R2.

Only one of my users have this problem...

He can't click the start button. If he hover the start button, it flickers.

Furthermore if he minimize apps, then he can't click them in the taskbar to restore the apps window state.

I have many user on the same box, but it is only 1 user having this problem.

Any idea how to fix this?

Solution 1:

I've seen this sometimes happen when there are two explorer.exe processes running. Open up Task Manager with CTRL + Shift + Esc and check if you currently have two explorer processes running.

Either way, a restart of the process should fix the issue. Just end the processes and start up a new one with File > Run New Task

Solution 2:

I guess it's a known issue for Microsoft and there are a lot of fixes for not functioning taskbar. Here is the step-by-step manual on how to fix it. https://answers.microsoft.com/en-us/windows/forum/windows_10-start/fix-windows-10-taskbar-not-functioning/cc475554-e5a1-4e28-8444-83bd74a84bf7?tm=1438445987147