The Check for update function in the Quick launch menu enables updating your antivirus database with the newest known viruses and updating the antispam rules. In the opened window you can see the updating process.
Use this function only in extraordinary cases. It is more advantageous to set the automatic database update in the Scheduler card, that takes care of the regular update according to the set parameters.
During or after the update you can click your mouse on the arrow on the bottom part of the window and display the information about the update process and see the updated modules.
If the present antiviral signatures and/or antispam rules are actual, an announcement that update is not necessary will appear. The same information will be displayed in case that the update isn't necessary. In Windows 2000 and XP is the same information also displayed on a information balloon in the notification area of the Windows status bar.