I have a server 2012 server. The main dc has two virtual attached running virtual SQL and virtual exchange. The server has got slow! Running task manager shows 5gb usage by sql however we don't have sql installed in the main DC. Within task manager it shows it is something to do with "windows internal database". The server also appears to have a user under c:\users called MSSQL$MICROSOFT##WID. I have browsed around and suggestions are WSUS. However I don't have this installed.