Did you attempt to install it with administrator credentials?
Please un-install it.
Visit (www.impulsedriven.com/impulse_setup_full.exe ) for the latest full-install
Make sure all of your AV and other anti-malware software is disabled before installing and then run the setup file as an admin account.
Please also make sure you've got up-to-date IE 7 and .NET installations (as both are required for Impulse to function correctly).
thanks,
the Monk