Sometimes "stupid.zip" is actually "stupid.zip.exe". Make sure your file explorer is set to so you can see the true nature of the file. A ZIP file that is actually an Executable (.exe) or a Script (.vbs) is almost certainly a virus.

The most effective way to interact with a file like this is to delete it immediately. Malicious files often use "reverse psychology" or aggressive names to pique curiosity or shame a user into clicking. If you didn't specifically request this file from a trusted source, it is likely (a small file that expands to terabytes of data to crash your system). 2. Sandbox Testing

If you are on Windows Pro, use the built-in Sandbox feature which wipes itself clean the moment you close it. 3. Online Scanning