It is not a false positives unless you want your Internet Explorer to accept incoming requests. The normal use for the IE is to sent request not to accept them, meaning that it is acting as a client not a server.
In some cases however it may be required for the IE to accept incoming requests, for instance if you make an online scan. But the IE should only be able to accept requests for such special purposes, after that you should unauthorize the IE for the Windows Firewall , so that you are aware if a website tries to make requests to your browser.
If you scan online often you may want to set
to the ignored products list. You can also configure the Windows Firewall to ask again and not authorize permanently.