Full Screen Internet explorer  Start button disappear

Move pointer to the bottom of the screen
Click and drag up

Lock start menu

Start> Run

regedit

Ok

double click

HKEY_CURRENT_USER>Software>Microsoft>Windows>CurrentVERSION>Policies>Explorer

double click right frame: New>DWORD value

Name the file: NoChangeStartMenu

Double click file: set Value data 1

OK