This is necessary as a new installation has not all the latest
Malware signatures included, because every day hundreds of new
Malwares are added to the detection. The signatures, as well as any available, new program components, are automatically downloaded and installed during the online update.
Login:
In order to have access to the updates you need an a-squared user account. This account identifies you to the update server and ensures that you receive the correct update files.
If you don't have an account already, you can create one for free at any time by clicking the "Create account" link within the program or at the a-squared website.
Create an a-squared account

After you've created an account, you'll receive an e-mail with the login username and password. Enter these details during the online update and click "Login".
On the next screen, please select one of the licenses which are attached with your user account. The selected license will be used on your computer and may not be used on any other machine.
Once the license is selected, click "Next" to go to the updater settings dialog. Choose your preferred settings and go next to the download of available updates.