Open CCleaner and on the left select the blue toolbox. In the second column there are 4 tabs and the Uninstall is the first one. Check if there are any Sophos products left on the system. If so click on it and select "Run Uninstaller" at the top right. Repeat as necessary.
Then choose the second tab in the second column - Start Up. Look for the entry for Sophos, select it and click on remove.
Whislt you are there disable any other programs you don`t need at start up. (You can re-enable them if necessary.)
Now go to the blue registry icon. At the bottom select scan for issues". When it gets to 100% select "Fix Issues" When prompted save a copy of the registry to a location on your drive. (I use a folder called "Registry Backups". Then complete the operation.
Lastly go to the blue CCleaner (Brush) icon and at the bottom right click the "Run Cleaner" icon. Ignore the message about permanently removing stuff - this is a pretty mild cleaner and I`ts never let many of us down on this forum.
This thread is now locked and can not be replied to.