Recently I keep getting the error "The proxy server is refusing connections" while trying to use Firefox. I encountered similar errors on Chrome and IE. The problem seems to go go away on its own temporarily for about ~10minutes every so often without me doing anything and then comes back again. I ran a full scan with both MSE and malwarebytes. The MSE scan did not find any threats while malwarebytes found about 20 things which I quarantined. However, this did not solve the issue.
I am still able to play online games and connect to programs such as Spotify and Steam.
I am able to get around this issue by turning on Hotspotshield, but it severely slows down my internet.
Anyone have any idea what else I can do?