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Donât spray directly onto the computer though: you could accidentally get Windex on your monitor, which would be bad. Windex is ammonia-based, and ammonia (along with alcohol) can seriously damage your screen by stripping it of anti-reflective coating or by causing it to cloud up. Use a Q-tip to clean spaces you canât reach with the cloth.
1 You can also run a port scan on your computer using a Web-based tool such as Gibson Research Corporation's ShieldsUP!. 2  When used in combination with the netstat utility in Windows, a Web-based port scan provides a more comprehensive view of your computer's vulnerable ports.ype an Administrator password and press Enter if the computer prompts you for administrative credentials. Type netstat-a in the Command Prompt window, and press Enter.. The computer displays a list of all open TCP and UDP ports. Look for any port number that displays the word LISTENING under the State column.