Avg tune up has stopped my computer working

Help please. Yesterday I subscribed to AVG PC Tune up and when my machine fired up this morning it said the trial had expired. When I clicked ok…it then went into ‘its updating mode, which it has done all day long. I managed to get into it however taskbar was all different and all the desktop icons repeatedly flashing on, I selected to restart to see if that would help and now it’s as if I have a black screen which occasionally pops up with a few icons at the bottom…it’s completely ruined! How can I get my PC back?

Alyson,
We regret the inconvenience, have you tried to reboot your device in safe mode? If not, reboot your device in safe mode http://support.avg.com/SupportArticleView?urlname=How-to-reboot-your-computer-into-Safe-Mode and uninstall http://support.avg.com/SupportArticleView?urlname=How-to-uninstall-AVG AVG PC Tuneup to check with the issue.

Alyson,
We regret the inconvenience, have you tried to reboot your device in safe mode? If not, reboot your device in safe mode http://support.avg.com/SupportArticleView?urlname=How-to-reboot-your-computer-into-Safe-Mode and uninstall http://support.avg.com/SupportArticleView?urlname=How-to-uninstall-AVG AVG PC Tuneup to check with the issue.