Hi [NAME] welcome to thid. s free user-to-user Alienware laptop discussion forum.  Please look at the "Windows 10 64bit" Drivers download resource at Alienware M14xR2 Drivers Download for Windows 10, 8.1, 7, Vista, XP (driverscape.com). Hope this helps.   This page contains the list of device drivers for Alienware M14xR2. To download the proper driver, first choose your operating system, then find your device name and click the download button.  
I have recently cloned my [UEFI] ssd drive [GPT]  from a different computer [Windows 10] to my laptop, but now my touchpad is not working/detected, PS/2 Port Touchpad is hidden in device manager. I've tried reinstalling and uninstalling completely. Restarting and it just shows device not working properly with a code 24. What I've noticed is that the older drive from my laptop [Window 7] [Legacy] [MBR] worked well with the touchpad before since it is the original installer cd for Windows 7. I'm guessing it's compatibility issues as the M14x R2 was not yet optimized to run [RAID] [UEFI] on Windows 10.[IMAGE] 
M14x R2, different PC OS image, issues