CF10 Mandatory update - stalls at progress bar

Hello, I have tried a few times to install the mandatory update on CF10 following the instructions via cmnd prompt

cd to C:\ColdFusion10\hf-updates where the downloaded cf10_mdt_updt.jar is located

execute c:\ColdFusion10\jre\bin\java -jar cf10_mdt_updt.jar

The intsaller runs fine and steps through the requisit steps - shuts down CF server fine - then commences to install only to freeze completely very early in progress bar. Im required to shut it down via the task-manager.

I have tried many times... even reinstalling CF

Does anyone have any suggestions

IIS7.5

Windows 7sp1

CF10 Standard (and developer)