FAQ
Entering the activation key, the program says "Invalid license number".
Should I uninstall other anti-virus programs before installing avast!?
I can't uninstall avast! via "ADD/REMOVE PROGRAMS" in control panel. What else can I do?
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Q: I haven't received the license key. A: Here are the most common reasons for not receiving the key:
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Q: How can I check the updates expiration? A: Please follow the instructions below :
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Q: Entering the activation key, the program says "Invalid license number". A: The activation key is valid. Try using the copy & paste method to enter it into avast! (watch the instructional video); Also, keep in mind that this number can't be used on any server operating system, and that you have to be logged in to Windows with administrators rights (to enter they key). |
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Q: How can I uninstall avast!? A: You can uninstall avast! just as any other software - using ADD/REMOVE PROGRAMS in Control Panel. If any problem appears, use the avast! uninstall utility.
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Q: Should I uninstall other anti-virus programs before installing avast!? A: Yes. Using two or more antivirus programs can cause problems and the operating system may become unstable. |
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Q: I can't uninstall avast! via "ADD/REMOVE PROGRAMS" in control panel. What else can I do? A: You can download our uninstall utility called AswClear or AvClear4 (it depends on the version of avast! installed on your computer) which will remove it. Please find more information by clicking here. |

