None of the archives on this site are password protected.
If your archiver is asking for a password then there is something horribly wrong with your archiver program. Make sure you are using one that actually supports 7-zip.
You might try re-downloading your file just in case something got messed up.
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Microsoft Windows NT 4.0 Enterprise Server (4.00.1381.1) 4.0 Enterprise Server (4.00.1381.1) English
https://winworldpc.com/download/416031c2-ab18-c39a-11c3-a4e284a2c3a5
If your archiver is asking for a password then there is something horribly wrong with your archiver program. Make sure you are using one that actually supports 7-zip.
You might try re-downloading your file just in case something got messed up.