Disable Num Lock Key
Swallows the Num Lock key system-wide so the user cannot toggle the numeric-keypad mode. The current Num Lock state at the moment the policy is applied stays as-is until the policy is turned off.
Hot Keys
Block Win-key and Ctrl/Alt combos at the driver level so they can't be used to escape lockdown.
6 features
Disable Caps Lock Key
Swallows the Caps Lock key system-wide so users cannot accidentally (or intentionally) flip into all-caps typing - useful in form-entry kiosks and data-entry workstations where uppercase input causes downstream parsing problems.
Disable Scroll Lock Key
Swallows the Scroll Lock key system-wide. Excel and a handful of legacy apps treat Scroll Lock as a navigation-mode switch; blocking it removes that surprise behaviour for end-users.
Disable Ctrl+Alt+Del Menu Items
Hides every action button on the Ctrl+Alt+Del Secure Attention Sequence screen - Lock, Switch User, Change Password, Sign Out, and Task Manager - policies.
Disable Alt+Tab / Win+Tab / Ctrl+Alt+Tab
Installs a low-level WH_KEYBOARD_LL hook that swallows the VK_TAB keystroke whenever Alt OR the Windows key is held down - kills Alt+Tab (App Switcher), Win+Tab (Task View / virtual-desktop picker), Ctrl+Alt+Tab (sticky App Switcher), and the less-common Win+Ctrl+Tab.
Disable Ctrl+Esc (opens Start menu)
Installs a low-level WH_KEYBOARD_LL hook that swallows VK_ESCAPE whenever Ctrl is held down - kills Ctrl+Esc, the legacy Start-menu shortcut that still works on every keyboard / RDP session / scripted SendKeys() call even when the Start button itself is hidden.