proxy server error cannot connect to internet

Im borrowing a laptop with windows 7 for doing embroidery design and transfer, I must have downloaded a virus because I cannot uncheck “Proxy server” I even followed a tutorial on going into “run, regclean” something along those lines, and deleated the proxy and suspicious programs in there. I still cannot get online! Can anyone walk me through this or take over my screen and fix this for me?? I feel horrible I borrowed this computer and totally screwed it up, any advice?? Thanks

  Fruit Bat /\0/\ 22:55 06 Mar 15
  1. Change your forum user name before the spambot harvest your email address.

  2. what antivirus antimalware is installed on the machine - run it.

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