Windows 3.x (3.0, 3.1, 3.11) no longer receives security updates
Support for this version has ended (December 31, 2001). These guides can still help you set up or repair a computer, but where you can, keep it off the internet for banking and email, and plan a move to a version that is still supported.
Guides for Windows 3.x (3.0, 3.1, 3.11)
2 guides. Start with the one that matches what you want to do.
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How-to
Windows 3.1 and 3.11: how to install and set up
Check the hardware and MS-DOS, protect your files, then install Windows 3.1 or 3.11 from your own disks using Setup, and start it with the WIN command.
Windows 2000 and older
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Fix
Windows 3.x: install programs and fix common problems
Install a program from Program Manager, remove one safely, and work through Windows 3.1 crashes, low memory and startup trouble from the safest step first.
Windows 2000 and older