Hi Sabbir, thank you for your detailed follow-up. I’m glad you’ve already taken steps to troubleshoot both issues. Let’s go deeper into each one to help you get your Surface Book 2 running smoothly again.
Phantom/Ghost Touches & Auto-Brightness Behavior, Since the touchscreen worked fine in the UEFI menu, that’s a strong indication the issue is not hardware-related, but rather software or driver-related. Here are a few things you can try next:
For Advanced Driver Cleanup and Reinstallation, Open Device Manager Then Expand Human Interface Devices, Right-click HID-compliant touch screen and choose Uninstall device, Do the same for Intel Precise Touch Device if listed then Restart your Surface. Windows should reinstall the drivers automatically.
If the issue persists, consider downloading the Surface Book 2 Drivers and Firmware package from Microsoft’s official site and reinstalling all drivers manually.
Sometimes ghost touches are linked to Intel graphics settings, then Open Intel Graphics Command Center or Intel HD Graphics Control Panel, Look for Power Settings then Disable Panel Self Refresh.
In Auto-Brightness Still Active Despite Settings, this is a known issue where Content Adaptive Brightness Control (CABC) overrides user settings. But before that, Be cautious when editing the registry. Back it up first, to disable it simply Open Registry Editor (regedit) then Navigate to: HKEY_LOCAL_MACHINE\Software\Intel\Display\igfxcui\profiles\media\Brighten Movie
Then Set Enable to 0, Also check below:
HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\GraphicsDrivers\Configuration
and look for FeatureTestControl set it to 0x00000000
In Windows 11 Upgrade Path, you mentioned using the Windows 11 Installation Assistant, which is a good workaround. Since your Surface Book 2 doesn’t show the upgrade in Windows Update, it likely has a 7th Gen Intel CPU, which is not officially supported.
What You Did is Right, Using the Installation Assistant bypasses the TPM/CPU check.
If you meet TPM 2.0, Secure Boot, and UEFI requirements, the upgrade should work.
Also, for post-upgrade, after upgrading, check Windows Update for any missing drivers or firmware then Visit the Surface Book 2 support page to manually install any missing updates, please see the link, https://support.microsoft.com/en-us/surface/download-drivers-and-firmware-for-surface-09bb2e09-2a4b-cb69-0951-078a7739e120
You're doing a great job navigating these issues. If ghost touches continue even after driver reinstalls and registry tweaks, consider a clean Windows reinstall or contacting Microsoft Support for a deeper diagnostic, here’s the link if you need it: https://support.microsoft.com/en-us/topic/customer-service-phone-numbers-c0389ade-5640-e588-8b0e-28de8afeb3f2
Let me know if this is helpful.
Chard