My computer keeps giving an error and goes into RPC shutdown five minutes after I connect to the Internet. What should I do?
All you need to do is patch your system with the latest security patches from Microsoft (depending on your OS version). Scan your system for the missing updates and patch them accordingly. Here's the link to the patch for your particular RPC problem.
After you have patched your system, install a personal firewall on your system and block the ports you don't require. Also, disable all the unneeded services on your system.
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