Hi.
I was making improvements to an old Windows XP Pro PC. I uninstalled various programs with Revounistaller, installed Service Pack 3, ran Ccleaner, etc.
I restarted my PC and I now get the following message(picture attached). I cannot right click on my computer, or right click on the desktop or select control panel without getting the warning in the attached picture!
Does anyone know how to remedy this?
Thanks.

This typically points to a firewall issue. You might to disable it, and give it a go - enable again before connecting to the Internet. What happens in Safe Mode?