Help; I installed a program and no desktop or taskbar

The program (a proprietary program) asked to reboot (I was not manning the
install) and when we rebooted and logged back into windows something very
strange happens: The taskbar flicks on and goes off permanently, there is
only desktop wallpaper (one of the windows default bitmaps). When I tried
Ctrl+Alt+Delete there is absolutely nothing listed in the taskmanager window.
I tried pushing the start menu key on my keyboard and got a Kernel 32 error,
and I could not click on the details button to see what they were. The only
thing that fixed this Kernel 32 error was turning off the comptuer; I had no
keyboard or mouse functions after this happened.

Booting into safemode produces the same result.