I just had to install the latest Security Update from the Mac App Store and it started auto updating.
Then when I completed the update (and restarted) my Mac asked me to enter in my Apple ID password and asked me if I would like the 'Cloud keychain thing', after that it said it was setting up my mac (just like the first installation!) it did however keep all my data.
Is this normal for the latest update or do I have some sort of virus?
Here are the latest updates on my Mac