I don't think I'd ever have gone for an add-in card being the cause!
Thanks for coming back with your resolution - I'll try and remember to look further afield for the source of the problem, next time.
Computer type Laptop System Manufacturer/Model Number Asus K52F OS Win 7 x64 Home Premium (and x86 VirtualBox VM) CPU i3 370M Motherboard Asus Memory 8GB - finally :) Graphics Card it's an i3, dude! Sound Card onboard Monitor(s) Displays 15.6" built-in Screen Resolution 1366x768
PSU n/a Hard Drives 750GB Seagate internal
Sundry external drives attached to other computers on the local network Internet Speed as much as I can get - usually on a dongle, so <1Mb/s Antivirus MSE Browser IE10/Chrome/FF(if I must)
Oh and just for giggles I tried re-installing the Inter drivers again and they wouldn't install at all. I then tried the Intel Matrix software and the invalid dialog came back. So the original fix of removing that software and/or re-installing it you guys use all along is valid. Obviously I am not going to try and use it anymore.