I just downloaded avast!4 last night and when i tried to type in the license # it says its an invalid license #…can someone help?
Have you tried copy/paste the key from the email?
just tried that and it still says invalid
It happened before that there was something wrong with the key generating system. The same may be going on here. Have you already requested a new key and tried that one?
Hi!
I’m having the same problem. Searching through these forums I saw some advice about WinXP and administrator rights, but I had this problem both with XP and Win98.
If it is a problem with the key generation system, what can I do?
Make sure you don’t copy extra empty space after the key… this is usually the couse of troubles with registration keys…
Already tried. I tried copying and pasting and even typing it… Don’t know what can it be…
It happened in the past…
Maybe you can ask for help and inform your key to support@avast.com
There they will be able to see if your key is valid or not.
Are you using any illegal keygen? Means crackers wrote this program and it generates seriel numbers… if it is than surely you will face this problem… SUPPORT THE DEVELOPERS BY BUYING THE SOFTWARE LEGALLY ;D
Already did… Even sent them a screenshot. We’re trying but, still now, no result…
<____@asw.cz> escreveu: Hello, The number is valid. Use copy & paste method to enter it into avast! and keep on mind that this number can´t be used on any server operating system. Also you have to be logged to Windows with administrators rights and the date/year indicated on your computer must be correct. And it's not pro, its por as for portugese version.
Already told him I had this problem with WinXP and Win98SE. My “old” (mar/2004) key is still working… But I’m getting worried…
The “pro” thing is because I mentioned the link I downloaded it from:
http://files.avast.com/iavs4pro/setuppor.exe
See the “iavs4pro” part?
Please, do not post the license number here 
I do recommend you register again, copy & paste the registration number (skipping the space character at the end of the number) and post there.
Can you try?
Hi, folks.
Talking privately to Technical, we tried the license key I received and avast! said, on HIS computer, it was invalid.
Thanks! At least the problem doesn’t seem to be on the user (me)! hehehe
Any ideas on how we can solve this problem?
Thanks in advance,
JL
Request a new key from HERE
Use a slightly different name if you have to.
Carneiro, can you try to register again like Eddy said?
I don’t think it’s necessary to use a different name, except in the case you receive the same number.
Alwil team, I do confirm: his personal number failed to install in my avast! Home computer 
Can you send me the number? Thanks.
I did it few seconds ago