I'm able to run the game just fine under Windows 7 Pro SP1 in Software mode with maximum settings. However, I needed to download and add tsd32.dll to the game directory, and installing the 1.1 patch required me to do the following:
- Copy the "Vigilance" folder to a Windows XP virtual machine.
- Install the 1.1 patch. You'll need to point the installer to the main game executable, and you may need to install it twice (in spite of what the patch's readme says.)
- Copy the "Vigilance" folder on the virtual machine back to the host OS.
The installer on the CD-ROM, which is
_ISDEL.EXE,
not Install.exe, and the main game executable both need to have Windows 95 compatibly set and run as an administrator.