Something must have gone haywire installing blackberry desktop 6.1 software or windows installer is going nuts
You have me a bit confused with "Windows installer is going nuts" part of the post.
Do you mean that it wants to re-install Windows, or re-install the BlackBerry program ?
If this is the BlackBerry program
trying to reinstall each time, there may be a chance that this program has become corrupted
The first step would be to uninstall the BlackBerry program
from Programs and Features. Next make sure you have the latest version
of this program.
As this is being done, try running the same Video clips while the program is uninstalled.
Only if the problem persists after the uninstall and check, can you go further into diagnosing the problem.
Thank You -