Upgrade to Avast 7 hard lock

After automatically upgrading to avast7xfree, upon rebooting my machine, it comes up with the “participate in avast community” check box and finish, after clicking finish, machine hard locks and completely unresponsive including CAD, manually have to shut down machine.

was unable to recover from the update short of safe mode boot and uninstalling avast.

i did however attempt to repair avast in safe mode prior to uninstalling with same results.

EDIT–
just want to follow up that this was an auto update processed by avast on itself, update downloaded and completed i would estinmate within the last few days (feb 28/29/or today mar01)

will follow up with results of re-installation.

go here to make sure you have completely removed all versions of avast
https://support.avast.com/index.php?_m=knowledgebase&_a=viewarticle&kbarticleid=1062&nav=0#idt_02

then here for the latest version
http://forum.avast.com/index.php?topic=93866.0

report back reults