@ CannedSkittles,
What product of Avast do you have (Free, Pro, AIS)? What version are you using?
The best way to register is through the Avast GUI, but you need to be online (on the Internet) while you do this. Is this what you tried to do?
After you installed Avast (not downloading it), did you reboot after installation
prior to registering?
However, if you have the Free version of Avast, you do not need a key. This is all you need:
http://www.avast.com/registration-free-antivirus.php.
After you register, then you should update your Avast virus definitions.
Should you need to do a Repair (although I do not think you need to at this point unless you had a corrupt download or install):
- Go to Control Panel > Add/Remove programs > Avast Antivirus.
- Scroll down and choose Repair function in the pop-up window.
- Reboot.
I will await your reply. In your next post, let us know if you had a previous version of Avast or another AV on your machine and if so how you uninstalled it. Thank you.
Edit: To the OP -> I just noticed that you have 2 active threads regarding this issue. Here is the other one
http://forum.avast.com/index.php?topic=74890.0. So that you don't confuse people helping you and yourself, you really need to stick with one thread.