Have upgraded from AIS to Premier on 3 PCs licence. All PCs on Win7 64. After upgrade installation 2 PCs OK, one PC get error Unable to start Firewall.
Any solution?
Thanks
Joaquin
Hi
You could try a ‘Repair’ as there may be corrupted installation file/s
Go to Control Panel/Programs&Features (add & remove)/Avast and click Uninstall/Change
An Avast options window will appear, scroll Up/Down and Choose “REPAIR”
Be sure to reboot after process completes. 
Your advice resolved the problem, thanks for such quick response which was much appreciated.
Regards
Joaquin
Glad I could help.