Windows 8 now requires the "Desktop Window Manager Session Manager" Service running as it hosts the OpenGL compositer which is now required for the Windows 8 Explorer shell to run. This was not the previously the case in Windows 7 and you'd just get the 'Native Unskinned' UI, could save considerable resource by disabling the "Desktop Window Manager Session Manager" and "Themes" Services, avoid ssues with some applications and gamas that use OpenGL and/or DirectX, and also see substantial performance improvements with some applications and games...
I'm wondering if the "Desktop Window Manager Session Manager" Service can now be stopped with Tihiy's shell installed/enabled,
unlike Windows 7, there's no "Desktop Window Manager Session Manager" service in services.msc in Windows 8.
if you delete C:\Windows\System32\dwm.exe
under explorer7, you can enter desktop after reboot, but black screen after logoff and logon ie you lose the ability to logoff I don't think it's a big problem though.
under explorer8, unable to enter desktop after reboot, black screen instead. it's also a black screen after switch explorer7 to explorer8. ie dwm.exe is necessary for explorer8.