khorram

Unigraphics! interesting to see somthing like UG is mentioned here.
In general high-end products are based on much older but well-proven and tested cores/kernels look into UG in CAD/CAM and Maya in CG. try to compare the maximum file size handling capacity of a high-end product to mid-ranges or freewares. A full assembly of a Boeing 777 in Catia or a 8 millions+ polygons scene in Maya on a regular PC can crash any other program exept very few high-end programs in their range.
Of course if you can afford a modern racing car or a new Ferrari you can afford to keep a fun and easy to drive car such as Beatle with auto transmission too, for your everyday boulevard drive and keep your racing car for competitions.
You can have Silo and of course Wings3D if you can affor to have Houdini or Maya.

Hey men, I didn't read all the posts in this topic but from the first post I should say it is not a big deal to cry about. You can easily disable all the services related to Houdini by going into computer management(Right click on MyComputer>Manage) go to services and applications select any services you don't want to run go to properties disable them or if resisted set them into manual, reboot into safe mode then delete them or disable. easily can be applied to any unnecessary services.
Not recommended for beginners.

Other solution (and the most effective one):
Restore your computer to any point before installation of any unfamiliar program or driver if you are not certain how to clean up and uninstall it completely. Make a safe restoration point for your windows.

I know only Windows, no comment about other OSs.