Uninstall problem HELP!

OK, I have read all of the uninstall answers here with a search and I seem to have a bit of a problem with getting it to go away. I first tried to just drag it to trash. It is still there. But it of course is now gray in the preference, so I can no longer access preferences. Now when I try to open the application I only get the bouncing icon in the dock for a few minutes, then it stops, and nothing. Also, I now have “Zero KB available” for applications, documents, favorites, well, the entire HD. Before installing Avast I had in the GB’s available. Now there is ZERO! I need this thing off and I need to find out what it did with my available space. I can not even use my puter as it is now so incredibly slow, I am using a friends PC to send this message. PLEASE HELP! Thank you, Aprildawn

I now seem to have an additional problem. I decided to shut down my Mac, and now I can not even get it to boot up. It just sits there and spins and spins and spins. I have never ever had problems with my Mac until I downloaded Avast a few days ago. I have an older iMac loaded with Leopard. I really need help now. Thanx, Aprildawn

Hallo,
honestly, the biggest problem for the Apple machines is … usually MacOS X itself. Not avast, it’s a well behaved userspace application, and I repeat, application. Application can’t cause boot lock-up, it’s always just an application, which has (except the socket to the kernel extension) nothing special to do with the system/xnu.

Your hdd space might be probably exhausted, and thus blocking the system, who knows - especially Leopard is so HDDspace/memory hungry, that one gigabyte might mean “browse few pages, and end with 0 bytes free”. Try to boot in single-user mode, and get rid of files in trashcan, swap files in /private/var/vm, etc.

regards,
pc