If your Pulsonix software is locked to a HASP USB key and you are using Windows 8, you need to be aware of a potential incompatibility issue with the SafeNet drivers for the key if you are updating your o/s to Windows 8.1.
Before doing the o/s update, you should first look at updating your driver as the existing one may be rejected by Windows Update as incompatible.
You need Sentinel drivers which are at least version 6.60. These can be downloaded from the Tool Downloads page of the Support section of our web site. http://pulsonix.com/tools.asp#hasp