Using Setwindowshookex To Run A Callback System To Trap The Keys Just Trapping "windows" Key Atm

I'm making a kiosk style desktop replacement.

Im using setwindowshookex to run a callback system to trap the keys just trapping "windows" key atm.

if I step through just as the program goes the the keyboardcallback function declaration line it pauses for seconds before moving to the next line. This directly precedes the new variable declaration of the callback variable

While running this leads to only 1 press of the "windows" keys causing several hits of the "youve pressed windows key warning" sometimes 4 or 5 times with large pauses inbetween inwhich the window is unresponsive.

The Start menu is normally blocked however occasionally during the unresonsive times it might pop up but this is rare.

Or common reasons/solutions to setwindowshookex being slow Anyone know alternative method of blocking all hotkeys (apart from the 3finger salute i understand that, that is not accessible)?