Norton said "it only has 5 customers using it so it is unsafe." what is wrong with me being #6?
Nothing, IF you downloaded Electrum from here:
https://electrum.org/#downloadBecause Electrum contains some functions involving encryption... (which is something a lot of viruses and trojans do to try and prevent detection/removal) it is quite common for antivirus software to generate a "false positive"... Antivirus software isn't always 100% accurate (and Norton certainly isn't close to being the best either.

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There are a lot more than 5 people using Electrum... there are thousands if not hundreds of thousands... if there was a problem, we'd all know about it!