XPS 15 9575 Windows 11 clarification

Been running it for a week now, works like a charm. Fast, no quicker battery drain.

@eighteentee 

Please press the blue Accept as Solution button below if this post answers your question.

"why are Dell saying this system is compatible and yet Microsoft say it is not."  Microsoft will say its not compatible if TPM is OFF and or Secure Boot is OFF.

Dell computers tested for upgrade to windows 11

https://www.dell.com/support/kbdoc/en-us/000187485/

The following list of Dell computers has been tested for upgrade to Windows 11. If your computer model is not listed, Dell is not testing the device, and drivers will not be updated for that model.

Xps 15 9575 2 in 1 drivers

F2 BIOS TPM PTT ON , Secure Boot ON

Backup your system or get a new blank drive and try the update.

I recommend a USB 2.0 FAT32 installer media.

SanDisk - Cruzer 32GB USB 2.0 SDCZ60-032G-A46
Sandisk 32gb usb2.0 flash drive

I recommend download of the WIN11 ISO

Backup your system OR get a new hard drive.
And Use Rufus 3.15P to make

32 gig FAT32 NTFS combo boot media.
Rufus-3.15p.exe

If it tastes bad you can swap out the old drive and no harm done.

WIN 11 RTM Links since WIN11 is official now.

PC Health Check APP click the link and test BEFORE Trying 11.

https://aka.ms/GetPCHealthCheckApp

https://www.microsoft.com/en-us/software-download/windows11

This is RTM not insider builds so it does not die OCT 25th 2021.

Installation Assistant (Upgrade now)from 10 to 11.

I do NOT recommend this option because it may lose ALL of your data crashing to the black screen of death with no recovery It auto BITLOCKER encrypts your drive rendering it useless if you do not have a backup and making recovery impossible when it crashes.

https://go.microsoft.com/fwlink/?linkid=2171764

Media Creation Tool for WIN11 used to Make WIN11 ISO

https://go.microsoft.com/fwlink/?linkid=2156295

Clean Install will require putting APPS back that WIN11 removes

3D Viewer
https://www.microsoft.com/en-us/p/3d-viewer/9nblggh42ths

OneNote for Windows 10
https://www.microsoft.com/en-gb/p/onenote-for-windows-10/9wzdncrfhvjl

Paint 3D
https://www.microsoft.com/en-us/p/paint-3d/9nblggh5fv99

Skype
https://www.microsoft.com/en-us/p/skype/9wzdncrfj364

Dell applications microsoft store
https://www.dell.com/support/kbdoc/en-in/000178205/

Media Suite Essentials for Dell
https://www.microsoft.com/store/p/media-suite-essentials-for-dell/9nn8bss5n72f
Download this unique launcher to help access the powerful video editing, playback and disc burning software included in CyberLink Media Suite Essentials. The CyberLink launcher ties all the applications in Media Suite Essentials together, providing a fast and convenient entry point for you to get started using award-winning software to enjoy your videos, photos and music.

Media Suite Essentials features:
Power Media Player: the world's top-selling Blu-ray player and media center
PowerDirector: innovative video editor and multi-time PCMag Editors' Choice Award winner
Power2Go : popular disc burning and PC backup solution

Dell Power Manager
https://www.microsoft.com/store/p/dell-power-manager/9pd11rq8qc9k
Dell Power Manager is an application that allows end users to maximize their battery life by
configuring how the battery should be maintained based on their personal preferences.
Dell Power Manager also supports alert notifications related to power adapter, battery,
docking and USB Type-C device/protocol incompatibility. Find more details here.
https://www.dell.com/support/contents/article/product-support/self-support-knowledgebase/software-and-downloads/dell-power-manager

Smartbyte
https://www.microsoft.com/store/p/smartbyte/9mwzs8xm2b89
Spend less time buffering and more time enjoying your favorite videos with SmartByte,
which delivers incredible streaming and interactive video performance.
By detecting and prioritizing your critical video traffic, SmartByte automatically
ensures that less important network traffic will not slow down or degrade the quality
of the videos you watch.

Mobile Connect Dell Mobile Connect
http://www.microsoft.com/store/p/dell-mobile-connect/9nx51w9gbs5t
A new software offering by Dell that integrates the Dell PC and the smartphone to provide
full PC-smartphone wireless integration to allow PC users to stay focused and avoid
splitting attention between two devices while working, studying or playing.
Download the Smartphone version via the mobile Apple Store
https://itunes.apple.com/app/dell-mobile-connect/id1241903676
or via Google Store.
https://play.google.com/store/apps/details?id=com.screenovate.dell.mobileconnect
Dell Mobile Connect is currently only available in English and Chinese.

A customized version for Alienware is also available.
https://www.microsoft.com/store/p/alienware-mobile-connect/9pmxq13q3lgp
Dell Drivers and Alienware Drivers are required.
Help and ConnectDell Help and Support

https://www.microsoft.com/store/apps/9n608895rj7k
Dell Help and Support contains step-by-step guides, videos, system information and support,
to make getting started with your Dell quick and easy. Plus, with detailed help and
troubleshooting articles, solving minor issues is a breeze.
Find more details here.

Win 11 at 4k on the 9575 is not a pleasant experience. The UI lag is crazy when switching desktops etc.