Get rid of the power and accessibility options on Windows 8 logon screen

To remove the shutdown button:

• Press the Windows Key, type gpedit.msc, press Enter.
• In the Local Group Policy Editor, open Computer Configuration – Windows Settings – Security Settings – Local Policies – Security Options.
• Find Shutdown: Allow system to be shut down without having to log on, double click it and select disabled – now the shutdown button will be gone.

To remove the Ease of Access button:

• Press the Windows key and search for cmd.
• Right click the Command Prompt result and select Run as administrator (click Yes when prompted).
• Enter this command to forbid everyone to execute utilman.exe:

  cacls %windir%\system32\utilman.exe /C /D Everyone

• Type Y when you're prompted.

Should you be getting an Access Denied error, change the ownership of System32\Utilman.exe to Administrators (type explorer . in the command to open browser in current location), then try running the command again.

You can also take ownership on the command line:

 takeown.exe /A /F Utilman.exe

For Windows Home versions without Group Policy Editor, you can try the following, run regedit.exe as administrator and find or add the following REG_DWORD value:

 HKEY_LOCAL_MACHINE\SOFTWARE\Microsoft\Windows\CurrentVersion\Policies\System\ShutdownWithoutLogon

a value of 1 means enabled, a value of 0 means disabled.

If the value ShutdownWithoutLogon is not there, just add it as a DWord 32-Bit value.