Hyphen in my computer's name causing T-SQL error I’m a developer, not a DBA (which is showing, I’m afraid). I am trying to run Report Builder 3.0 with SQL Server 2014 Express on my home computer (named John-PC) and cannot run my reports. 

I accidentally created a user/login combo of user = John-PC and login = John-PC\John. When I try to delete the entry with:  

Drop Login John-PC\John


I get an error: 


  Incorrect syntax near '-'.


I think the problem is the hyphen in my computer's name.


Is there a way to get around the syntax error?
Is there another way to change or drop the user (I tried dropping from sys.server_principals but received an error that I couldn’t make ad hoc changes).
Can I give Report Builder a new user/login name somehow?
If none of the above, can I change the name of my computer to John_PC or will that create a host of other problems that I can’t even imagine?
When you have special characters in a name put []'s around it to let SQL know that it's an identifier.  This is also how you manage special characters.

So in your case

Drop Login [John-PC\John]