[HKEY_CURRENT_USERSoftwareMicrosoftWindowsNTCurrentVersionWinlogon] 

Right click on the ‘Winlogon’
 folder and select ‘New > String Value’ 
Name it ‘Shell’. 

Right click on the newly created ‘Shell’ 
and press ‘Modify’ 

Type in the path to Steam.exe
 on your machine. By default
 on a 64-bit Windows 10 machine,
 the path is ‘C:Program Files (x86)\Steam\Steam.exe’