4dos 7.5 social advice

Users interested in 4dos 7.5 generally download:

4DOS 8.0 Free

4DOS is a command interpreter or "shell." That means that it displays a prompt, waits for you to type something, and then reacts to your commands.
4DOS was designed so that you don't have to change your computing habits or unlearn anything to use them.

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— I have installed 4dos but it says not compatible with Windows 10 64 bit. Says to contact you for SupportTrying to install on Gateway laptop.Can you advise?

Yes, 4DOS is not compatible with Windows 10 64 bit. You may need to seek alternative solutions or contact the software developer for further support.