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Networking I.P.B. 2122 18th November 1992 (SPF)
Department Category Implementation
Network Software Advisory
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Apricot Machines with PS/2 mice & Windows/Windows for Workgroups 3.1

It has been found that Apricot machines fitted with PS/2 mice may appear to hang or take longer than expected to exit Windows. This behaviour is caused by a problem in the PS/2 mouse BIOS. The computer is not hung, however it remains frozen for up to a minute while the mouse port is reinitialized.

The problem can be corrected by adding the following line to the [386Enh] section of the Windows SYSTEM.INI:

InitPS2MouseAtExit=FALSE

This prevents Windows from attempting to reinitialize the PS/2 style mouse port prior to exiting to MS-DOS. This may cause problems when you run some mouse-aware MS-DOS based applications after exiting Windows.

N.B. This problem is not specific to Apricot and also affects IBM PS/2 machines and any other manufacturers PC that uses a PS/2 style mouse port.

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Computing for a Connected World