Protect the computer at the user interface level. 

This means limiting the features that can be used. For example, in Window 3.1 many of Program Manager's features would be disabled (create icons, run programs, etc.). In Windows 95 you would want to limit access to the Start Menu options, or the Control Panel. Most purchased security software works in this manner.
Access Manager - More info

     If the above options do not provide enough security for you, download Access manager for Windows.

Access manager provides much more security than standard ways in Windows.

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