Thankfully got this sorted at long last.
After buying a new laptop early this year, I have been having serious annoying crackles and even sync problems using my ti2 with cubase 5 on windows 7 via virus control. After changing usb settings, virus audio driver settings. Latency settings, usb leads and even reverting back to cubase sx3 and having given up returned my TI2 back to access to check it

. I found the problem to be the inbuilt wireless lan card is the problem. Id not previously disabled this as my ti2 worked fine with my last laptop that had a wireless and was not causing any problem. It was that simple

. Got a really fast daw and a shit hot TI2 working in sweet harmony now

.