Mouse driver crashes Program Manager

[kristibektashi]

When I use both this driver and the patched SVGA driver for Windows 3.1, some weird errors show up. They stop appearing when I disable this driver.

Steps to replicate:

1. Create a VMware virtual machine and Install MS-DOS (I used version 5) and Windows 3.1
2. Download the Generic SVGA driver. as well as the VMware patch
3. Launch the Windows Setup from MS-DOS (cd C:\WINDOWS and SETUP.EXE) and install the Generic SVGA driver as a third-party display driver (I recommend the ET4000 1024x768 256 option, but you can select whichever one you like).
4. Lauch the Windows Setup (again from MS-DOS) and install the VMware Mouse driver
5. Insert the VMware Patch floppy drive into the VM
6. Type the following commands (overwrite existing files if asked):

A:
copy SVGA256.DRV C:\WINDOWS\SYSTEM
copy VGAPATCH.COM C:\WINDOWS\SYSTEM
C:
cd C:\WINDOWS\SYSTEM
vgapatch p
del VGAPATCH.COM
cd..
win

8. Try to move the mouse around. Also try exiting and restarting Windows a couple times, as well as minimizing/restoring the Program Manager. Eventually the first error should show up
9. The second error showed up when I tried messing around with Windows Setup from within Windows

[kristibektashi]

[kristibektashi]

To fix the issue run the Windows Setup from MS-DOS and disable the VMware Mouse driver (select the Microsoft or IBM PS/2 driver)

[kristibektashi]

Changed the title because I managed to replicate the issue without the SVGA driver being installed (I was using the regular VGA driver)