Help!!

Hi everybody. I have a problem. Before formated my computer I bought avast 4 professional and i have the code. But now i try to install the avast and the code doesn´t work :(… Can anybody help me?? Thanks

See the tutorial: http://www.avast.com/files/tutorials/insert_key.htm
Please take a look here: http://www.avast.com/eng/faq-invalid-license-number.html

What is the error message?
Is your system date/time correct?
Do you use copy & paste method?
Are you sure you do not include the ‘last blank space’ in the paragraph while copying & pasting?

OK thanks. The message is “Invalid code”. Maybe i copy wrong code. Is there anyway that Avast sent me the code againt to my email?.. Thanks so much

Yes, there is. Send an email to sales@avast.com and tell the story, or even, send a link of this thread.