Track Thread Cannot delete Avast Software key from registry

Hi!

Been trying to remove all traces of Avast from my Windows7Ultimate pc.

First thing I did was to use Avast's uninstall utility.

Then I searched the entire computer (C and D drives) for anything 'avast' and

deleted 151 files.

Then I searched the registry and deleted anything 'avast'.

But there was one key I could not delete from the registry:

HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\AVAST Software

On another forum I found an Avast Software folder sitting in,

File explorer -> Program Files -> Common Files -> Avast Software

and deleted it.

Still cannot delete the registry key.

I found an Avast Software folder sitting in Task Scheduler under Task Scheduler Library

When I tried to delete it I got, "The directory is not empty" error, but there's nothing to the

right where tasks would be listed.

When I right-clicked the Avast Software folder and tried to Display All Running Tasks I got,

"Task Scheduler service is not available. Verify that the service is running."

I checked Services: Task Scheduler is started.

And now I'm stumped.

How to:

1. Remove the Avast Software folder from Task Scheduler/
2. Remove the HKEY_LOCAL_MACHINE\SOFTWARE\Wow6432Node\AVAST Software key?

Thanks!