I upgraded on Vista Ultimate virtual machine to Avast 6 a few minutes ago. I did it as an internal upgrade. Everything seemed fine after the installation. Online Armor was ok with it as was WinPatrol. So, I allowed Avast to reboot the machine. It booted to a blank window. It took me awhile to do anything as the mouse would move about but I could not get out of the blank window. Finally, I suddenly got thrown onto the main window for the default hidden Admin account (which I unhid long ago) for Vista. I should have been presented with a login screen where I would log into my Admin account not into the default Admin account. I noticed that Avast did not load on the default Admin account as it should have. Other programs loaded but I also noted I had no internet connectivity. After everything but Avast loaded, I tried to use the Start button to switch to my Admin account. I found the screen was frozen although the mouse moved but I couldn't do anything.
I tried to bring up Task Manager and could not. Instead, I got a error message I had never seen before (googling later indicates it's a common error message for Vista and frequently has to do with installation of Antivirus programs not intended for Vista). The error message stated: Login process has failed to create the security options dialog.
Since I could do nothing with the Vista machine, I shut it down and chose (it runs on Microsoft VPC 2007 SP1) to delete all changes to disk since I had started the machine. That put me back, when I rebooted it, to how it was BEFORE I installed Avast 6. (So, Avast 5.1889 is running fine on it now).
How do I successfully install Avast 6 on this machine? It has no Vista service packs but I read that Avast 6 is supposed to run on all versions of Vista so the lack of service packs (due to lack of virtual disk space) should not be a problem. Thanks.
