Havoc 说:Yes you can. :/
I've done it many times.
1) Open the run box and type control userpasswords2 then untick users must enter username and password to use this computer

Microsoft has faced criticism for changing the pop-up box encouraging Windows users to upgrade to Windows 10.
Clicking the cross in the top-right hand corner of the pop-up box now agrees to a scheduled upgrade rather than rejecting it.