There could be a few of causes;
1] Malware. Ensure a full scan is done with the user's anti-virus, and then install and scan with Malwarebytes' Anti-malware and SUPEAntispyware.
2] Since explorer and Internet Explorer are now closely integrated, any bad IE add-ons can affect other explorer components. In IE goto Tools > Manage Add-ons, and do an elimination test.
3] Explorer is also affected by corrupt files. Does this user's Desktop have any files such as music or video files, (not shortcuts), that may be corrupted?
After one of my users starts up his laptop the taskbar shows, then after about one minute the taskbar disappears and you can not click any of the desktop icons.
The task bar is DEFINITELY not hidden, it is NOT dragged out of view,
The only ways I have seen to temporary resolve this is to
1. Restart the computer (takes a 1 or 2 restarts)
2. Hit Ctrl+Shift+Esc to launch the Task manager, Kill Explorer.exe, then launch Explorer.exe.
Any thoughts on a way to fix this.