What was the last true "single user" of Windows?

DOS

windows 3.1 was for multiple users too

madtownidiot said:

DOS

While the Windows 9x series offered the option of having profiles for multiple users, they had no concept of access privileges, and did not allow concurrent access; and so were not true multi-user operating systems. In addition, they implemented only partial memory protection. They were accordingly widely criticised for lack of security.
The Windows NT series of operating systems, by contrast, are true multi-user, and implement absolute memory protection. However, a lot of the advantages of being a true multi-user operating system were nullified by the fact that, prior to Windows Vista, the first user account created during the setup process was an administrator account, which was also the default for new accounts. Though Windows XP did have limited accounts, the majority of home users did not change to an account type with fewer rights – partially due to the number of programs which unnecessarily required administrator rights – and so most home users ran as administrator all the time.


cut from wiki

So in short, Windows 95 or 3.1?

Datalyss said:

So in short, Windows 95 or 3.1?

It all depends on how you define single user. If you class multiple user as having individual logon and privileged access then I would say that Windows ME was the last single user Windows.

I think you're all making harder than necessary. I withdraw the question.

Technically speaking windows NT was the first multi user OS from microsoft with version 3.1 which came out in 1993. Making Windows for workgroups the last single user os to be on the market by its self. From that point on single user and multi user OS were on the market together until windows 98. Then all OS (technically speaking) Were single user until Windows 2000 which was based off of windows NT builds. So that makes as z3r010 stated windows ME to be the last single user OS that was put out. Unless you count Windows Mobile into it. Which it is still on the market and a single user OS..