avast! Pro antivirus and avast! Internet Security can be downloaded and used free of charge for a 30-day trial period. If you decide that you would like to continue using the program after the trial period, you will need to purchase a license which will need to be inserted into the program. This will ensure that you continue to receive updates to your virus definitions and remain protected against the very latest threats.
Licenses for avast! Pro antivirus and avast! Internet Security can be purchased for 1, 2, or 3 years and for up to 3, 5, or 10 computers for use in your home or on your small home/office network. Single licenses of avast! Pro antivirus can also be purchased if you only need to protect one computer.
Licenses for avast! Pro antivirus and avast! Internet Security can be purchased via our website, www.avast.com.
After receiving your license file, you just need to double-click to open it and your license will be inserted into your program automatically. You can now continue to use your avast! antivirus for the duration of your license and you will continue to receive automatic updates to both the program and your virus definitions.
Alternatively, save the license file on your computer, open the avast! interface and click on the Maintenance tab. Next click on “Subscription” and then on “Insert license file”. A new window will open where you can browse your computer to locate your license file. Once you have located it, double click on it and it will be automatically inserted into the program.
If you have purchased a multi-license to protect several computers, you will need to carry out the same process on each computer where avast! is installed e.g. by forwarding the email with the license key attachment to each user, or by saving the license file on a shared drive, USB stick etc.