Originally Posted by firepages
like windows 7 the default administrator account in 8 is inactive by default (and by default no password as iBall says) and unless you activate it (#net user administrator /active:yes or run lusrmgr.msc) you wont even see it.
In Windows 7 you will also see the hidden adminstrator account by booting into safe mode but as mentioned it does not have a password by default.
I always use this hidden admin account in the non-professional versions of Windows in order to set permissions on groups/directories since you normally cannot do this with user created admin accounts on home editions of Windows. Makes me wonder if Microsoft even knows we can do that.