Hi there…
I’m using Cubase for a long time.
I’ve just upgraded Cubase 7 64bit from 6.5 and I have a HUGE problem,
after 10 min of using Cubase 7 it’s stops no matter what i’m doing! let me explain :
No sound , I can’t exit cubase … I can’t even use the Task Manager, the whole computer is stuck now. 
The only thing left for me to do is to reboot the computer.
It’s also happens with the 32bit version and with Cubase 6.5 both versions.
I’m using Windows 8 64bit , Q6600 , 8GB - TC electronics Impact Twins.
I’ve never had that proplem before!
PLEASE HELP!!! 
I can’t work like this and I’m losing costumers.
Sorry about my english… 