Try the free version at the link below:
And since it really wasn't clear what the "avast deletion thing" is, the link below provides an Avast Uninstall Utility and instructions on how to use it. Notice that you've got to use the tool while in Safe Mode.
Hope this helps.
I downloaded avast antivirus free edition but my desktop manager thing wouldn't let it install now I've tried to delete it with the avast deletion thing but it didn't now trying install different antivirus but can't as it has to be deleted any suggestion at are reasonable and free