What versions of Windows support USB?

Question

A. You need Windows 95 versions OSR2, 2.1, or 2.5 or Windows 98 for USB. The OSR versions require the USB supplement. You can obtain the supplement and answers to additional USB questions at the USB Workshop.

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Answer 1

Why ask a question which you then go on to answer yourself?

As you stated, Win95 and above can all support USB, though 95/98 will require extra software to do so.

Answer 2

Nobody uses Windows 95 it  is a legacy product Microsoft no longer supports, the same is true of Windows 98.

Windows 2000 and up all support USB. Most people use XP or Vista, both of which support USB.