Is my computer hacked, or something?

[question everything]

Several days ago I got an invitation for a party. The sender is from out of town so I should have just deleted but decided to view.

I had to provide an email to get something like TOS and opening it sent me into a supposedly a web page - started with http - but was empty. I decided to provide a different email, first one was a yahoo, this one a Comcast and same thing. An empty page with an address on the top tab. I was on Safari first and then on Firefox. I was on my desktop iMac.

On Firefox my computer was frozen. I texted one of the addressees who told me that the sender's computer was hacked.

I just forced quit my computer and when I restarted I selected the option of opening the previous screens. I also cleared the history of the previous hour on Safari, but not on Firefox.

Later I received the following email from

Microsoft account team

Microsoft account
Security info was added
The following security info was recently added to the Microsoft account am**[e-mail]:

Passkey

If this was you, then you can safely ignore this email.

If this wasn't you, a malicious user has access to your account. Please review your recent activity and we'll help you secure your account.

Review recent activity (a clickable message)

To opt out or change where you receive security notifications, click here.

Thanks,
The Microsoft account team
Privacy Statement
Microsoft Corporation, One Microsoft Way, Redmond, WA 98052

====

I did not click on anything.

No, I do not use outlook email though the first and last digits are if my real email.

My only "accounts" with Microsoft is with Excel and Word.

Today I was on Safari and again, everything was frozen so I forced quit the computer. This time I let it load as usual and it appeared OK.

I am now on Google Chrome and, fingers crossed, no problems so far.

Is the email from Microsoft legit. Shall I try to follow their suggestions?

Thanks

On edit, for some reason the email of the Microsoft team is missing. Will try again

Strange why does not the complete email show? Will type it with spaces

account - security - no reply - at accountprotection . microsoft . com