So, i did the BIG update that is rolling out those days.
Everything went smooth but the usual problems with every major update:
-The firewire driver is automatically changed into the (whatever chipset you firewire is based) one;
-The powercore(s) aren't recognized anymore and under 'system' we find a generic I2O device without a driver.
No sweat.
Just go to your firewire device and select back the legacy driver.
For the powercore, just set the I2O device for new drivers, select 'have a disk' and browse to the folder where your powercore drivers are (in my case C:\Program Files\TC Electronic\Powercore) and everything goes back to normal.
Cheers.