After the June Windows update, the "Windows is updating - do not switch off" message stuck at 8%. Using an iPad to search for options, I switched off (after 24 hours), re-booted, rolled back to the previous restore point, used chkdsk, sfs and Avast virus check and all came back "Clear". Installed the MS update that caused the problem and re-booted. Again OK
However Windows will not shut down since. After much checking, it appears that Avast! Antivirus in the Services is the problem. If I manually stop this service then shutdown, the computer will switch off.
Do I uninstall Antivirus then re-install it? If so, where is the source program? Your advice please.