ERROR! The specified serial is not valid

If you receive this error while installing, indicates that the installer cannot reach the server for verification of the serial.

Some systems add the Carenado server to a blocked list when it's identified as a threat.

To correct or avoid this, check the file "hosts" located in the folder C:\Windows\System32\drivers\etc and open it using a text editor and check if there's any Carenado line in there?

Probably at the bottom of the file you'll find one or two lines like this:

Just delete that lines, save the file, and try installing again, this should solve the issue.

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