The Procedure to Disable the Proxy Connection is as Follows :
Open Internet Explorer and click on Tools->Internet Options
Goto Connections and LAN Settings
Check to make sure the Proxy server is disabled.
The second case would be with your Antivirus. There are proxy settings enabled under your settings of any security programs that you may be using. If you cannot find the procedure to stop it, you can ask our techs on chat support to guide you.
Repairing Windows update services is not possible like you repair any windows apps from the add/remove programs. There is a procedure that you need to follow through command lines.
This requires the user to have administrator rights on his computer. As per the Microsoft set of rules defined on various Knowledgebase articles, the steps are simplified as mentioned here to reset your windows update services.