EXTREME DELAY IN KEY RESPONSE

get a cheap usb keyboard, plug it in and see if same issue shows

if it does, your keyboard on laptop is shot

if the usb keyboard does same thing, it's a more major issue on motherboard

anything spill on this unit by chance?

Hitting it hard ( and I can understand your frustration), will not help the keyboard problem.
I think you have a fault in the keyboard connector lead. The best way is to replace the keyboard with a new one or good 2nd hand one ( ebay is a good starting point). You can also prise off the offending key and clean underneath, however, this is a very delicate task.

The other solution ( and I'm going to get flack from the purists for suggesting it), is to remove the keyboard and wash it in warm soapy water, rinse it and let it dry THOROUGHLY" for 24 hours, this gets muck out from under the keys and works well if you spill coffee etc on the keyboard.

Distilled water for the rinse is best

I don't guarantee the above, but if you need to replace the keyboard, you have nothing to lose

There is a conflict within the settings for your 52. Make sure that you change the "look down" key setting in FSX as think the command your stick is sending is conflicting.

Try to configure it in Start->Settings->Control panel->Keyboard -> Repeat delay

Try going into Control Panel- Keyboard-- adjust character rate and repeat rate. Might fix ya right up..You might also want to replace the batteries....

http://www.tedmontgomery.com/tutorial/altchrc.html <--- that link should come in very handy for many people who read this, you can work around holding shift then hitting the 3 key for get #, as you can see you hit Num Lock then Alt and 35 on the ten key pad at the right to get the same character, give it a try it's fun and useful. If Num Lock won't work then try Alt + 35 and see if that does the trick.

Go into the Keyboard Properties and check the repeat delay. It may be set to long change it to to short and see if that helps.

Please post response and rate.

Find your num lock key on the keyboard. It is usually a different color which indicates that it has to be pressed in combination with the function or fn key. They FN key is usually located down in a corner. This will turn off the numlock keys and allow your normal keys to be utilized.

no easy fix on this one. the keyboard is going bad and will have to be replaced. take it to a repairman

check your keyboard in
Start/settings/control panel/keyboard right click open check what options available you may be able to stop key working