Rumor: Be advised these Mongoose clones are very unstable. I personally burned 2 and I’m on my 3rd.
Positive comment:
I’ve heard a few rumors about problems like yours, but fortunately, my clone has been working fine for over a year, and I bought the cheapest one I could find. Makes you wonder.
Another positive comment with tips:
My mangoose works flawless from day 1.
It’s pretty important to have a compatible laptop with some XP or 32bit-win7 installation. Don’t try fancy new 64bit or win8/10 stuff and never change (or update) a running system.
With virtual machines, you should have a good look at the usb-drivers inside the VM and that of the host. virtualbox worked for me.
More positive comment and use tips browse:
http://www.jaguarforums.com/forum/xj-x350-x358-xj6-xj8-xjr-28/jaguar-land-rover-diagnostic-tool-126851/
http://www.jaguarforums.com/forum/xj-x350-x358-xj6-xj8-xjr-28/need-help-buying-v139-jlr-mangoose-sdd-pro-134091/
http://www.jaguarforums.com/forum/general-tech-help-7/cloned-dealer-scan-tool-66558/