Take the tour ×  I have a PC that has equally severely degraded
performance across all browsers (IE, Firefox, Chrome), however
the underlying connection seems ok (pings google at 40ms) and
the other PC I have on the same hub is fine. Local apps also run
fine. I've run the obvious ad-aware, McAffee, CCleaner scans.
What could be causing this?   When running Charles proxy, things
go back to normal! Any ideas?  share|improve this question add
comment  1 Answer  up vote 3 down vote accepted  Do you have all
your browsers set to use a non responsive proxy? Are they all
set to use a proxy that isn't working correctly?  share|improve
this answer My assumption is this is what you are talking about:
charlesproxy.com If your browsers have been configured to use a
proxy (another device/program that intercedes to provide web
connectivity/protextion), and it isn't there, your browsers have
to timeout waiting for it before they can connect to a website.
You likely have auto proxy detect/configuration turned on in
preferenc