I can't switch to the user that is available on my computer?

Hello guys,

So here is the problem,

I have around 7 users on my computer. On switch user screen I can only see administrator and the one I am using.

The others were there yesterday but today they are gone. When I go to, c: then users/ every file of other users are there like user1,user2 and everything about them are still inside the files. So no problem there.

When I go usergroups and click, Configure advanced user properties. I can see all of the users but near my other 5 accounts it says Account Unknown. And near Admiinistrator and my own user it says My Path/username.

I am the admin and I also have access to administrator account which is the admin account that I have enabled from local users.

How can I switch the other users that are gone from switch user screen? I think the problem is it says they are account unknown. I've been looking for hours but can't fix it.

Any help?

Here is how it shows on the screen. And on switch user I can only see the ones that are in the bottom(2 of them)

Perhaps a system restore?

I am looking for a solution not a system restore thanks.

I cant just take files i have email accounts in outlook so i need to get in. They were available yesterday there should be a fix.

And also easy file transfer only sees 2 accounts so i cant copy those account to a new one

No one?

System restore shouldn't affect your mails or data, but whatever...

Wait until someone more experienced comments, I don't want you to lose your data.