I'm not sure what you are trying to say, the L501X completely supports Windows 8.1 as I've run this on it since it was first released a long time ago.  If you mean that Dell don't provide any specific drivers or support, well why should they as I can attest that even Microsoft don't fully know what features they are going to implement in an OS until it gets released to manufacture. Personally the only Dell updates that I really bother with are BIOS related as all the drivers are generally better served with hardware manufacturer ones Nvidia/Realtek/Intel, etc.
Hi I have purchased the laptop L501X with Wind 7. Consulted the DELL support center to upgrade the system to windows 10 and straight way the comment came was the system will not be applicable for the Windows 10. When the entire world going for the Windows 10 upgrade.DELL lets down the L501X customers to stay outdated in all the Fields. May I know where there is customer support here for the L501X.and what we must do  here sit with windows 7 or starring at other systems Do DELL want us to Sit the L501X users as like people starring at old age computers. Expecting the valid answer from DELL   Regards Munish Kumar <ADMIN NOTE: Email id removed per privacy policy> Ph:<ADMIN NOTE: Phone number removed per privacy policy>   
Windows 8,10 not supported for L501X Laptop