Deleted comments cannot be restored on the original post it was posted on AFAIK, if you think there are worth keeping for discussion, your best bet is to ask a moderator to include these on the body of your question.

You can always hang on the chat and tell us about the issue. I reported the comment as of now. You will need 5 rep to enter though. With some suggested edits, you can gain some reputation.

They're different; while Microsoft Office is a standalone application (you pay-it-once), Office 365 is a subscription service. Office 365 doesn't include Microsoft in the original name so I think the tag is fine as it is. (probably renaming it won't be a problem either)

You don't need to prove anything: you received a solution that does what you need by accepting it but that doesn't reflect the original question (aka is unclear). I think you should change this meta question to something like: "How can I improve this question?" if you're looking for advice on how it's unclear.

I don't see the reason to bring this up to Meta. I subscribe all of what @fixer1234 said and your latest edit it's just a image "proving" that the accepted question worked.

I got myself registered after I found out I wasn't logged in there

@fixer1234 the anonymous who created was actually me, unregistered :)

I edited that query you mentioned for Superuser, giving the credits to the original source.