In February has tried to update Avast from version 6.0.1367 to version 7.0.1407. After loading of updating and installation has appeared:
“Error reading product data from” C:\Programm Files\AVAST Software\Avast\setup ". Setup can’t continue."
I.e. updating wasn’t established. So besides, the module of scanning and definition of viruses has ceased to be updated.
Has tried to uninstall completely AVAST through the Control panel. That error, and jumps out further STOP.
Has tried to clean by means of Live-CD from a disk folder AVASTA, and the system has ceased to be loaded. Besides by means of Live-CD has returned a folder on a place, the system began to be loaded, but all sores remained: it is impossible neither be updated, nor to uninstall AVAST.
Who can will prompt as with it to struggle?
Read and follow the instuctions here http://www.avast.com/uninstall-utility to remove avast in safe mode.
thanks! 
Your welcome