I'm normally very good at avoiding this kind of thing but I'm not infallible. My wife asked me to have a look at her laptop as it was running slowly and I decided to download Optimizer Pro and it turned out to be malware.
I have gone through the standard steps first - uninstall programs, anti-virus and anti-malware scans and removed all threats, removed all the browser add ons.
The situation now is that the uninstall programs window no longer shows the uninstall/repair buttons. The only internet page that will load is my homepage and when I try to navigate to any website I get a 'unable to connect to proxy server' message, I believe there is something re-directing my internet but I can't find it.
I have run Malware Bytes several times and it is now showing no threats.
I also have some adware called Pirrit that I can't get rid of.
How can I resolve this without internet access?