I just upgraded to Extreme Security and the computer worked fine for a short while, then after I switched off for the night and rebooted the following morning, the PC appears to be locked out.
The boot-up process appears to go through ok, but once complete I just get the desktop background image, I do not get any icons or the taskbar.
Consequently I am unable to run any programs at all, so I can't even uninstall. The issue persists with any attempted login, even in safe mode.
Ria in Solihull, UK