Nothing installed, clean Win10.
Removed the wallet and rebuilt it from seed - everything was ok.
Must have been a "glitch in the matrix" then

Possibly some sort of corruption in the wallet file or something that was causing it to send or request "bad" data from the servers which was getting your client disconnected/timed out (banned?

)... I've honestly never seen that behaviour before.
Glad you managed to fix it by simply rebuilding the wallet tho.