revolver

Thanks for the suggestion. Unfortunately it didn't work but it's suddenly started working ok today!

I am unable to open CCleaner on my Windows PC. It was working fine when I last used it 2 days ago and I haven't installed anything since then so it doesn't appear that another program is interfering with it. When I click the icon, I get the standard Windows message asking if I'll allow the app to make changes and after clicking "Yes" nothing happens. I am using the Pro version.