The case of the missing mouse cursor on Windows 10
Today I got a machine that was upgraded from Windows 8 to Windows 10.
The user complaine that his CDrom-Drive was not working after the
upgrade. This was eaisly solved by googling around a bit and finally
issuing:
reg.exe add "HKLM\System\CurrentControlSet\Services\atapi\Controller0" /f /v EnumDevice1 /t REG_DWORD /d 0x00000001
Ok, problem solved, but there was another strange problem.
I plugged in a PS/2 mouse device and it didn’t work.. So I plugged
in a USB mouse which worked. Then Windows 10 was doing some updates
like it always does and after reboot my USB mouse was gone too.
No chance to get PS/2 or USB mouse working.
PS/2 mouse driver always showed an exclamation mark telling me
Code 10 – “Das Gerät kann nicht gestartet werden” (the device cannot
be started).
When plugging in a USB mouse, no error was shown in the device manager
at all, but still no mousecursor appeared which made it hard to diagnose.
There just was no mouse pointer on the screen at all!
When looking at the Event log of the failed device, it told be
error 0x00000184 (which translates to STATUS_INVALID_DEVICE_STATE).
Now from https://technet.microsoft.com/en-us/library/ff542127?f=255&MSPPError=-2147217396
this oerror occurs if the Mouclass service is not connected.
So it had to me a mouclass issue.
When checking registry HKLM\System\CurrentControlSet\Services\Mouclass
I realized that there was no Enum subkey which normally contains the
attached devices indicating that the mouclass driver was not started.
When trying to start the device driver manually with “net start” command,
this succeeded so my theory about it not being started seemed to be correct. But why? So I checked the places where it is usually referenced
and found out that in
HKLM\CurrentControlSet\Control\Class\{4d36e96f-e325-11ce-bfc1-08002be10318}
(which is the Mouse device), the UpperFilters REG_MULTI_SZ value, which should contain the value
mouclass
was completely missing for some unknown reason! So I created this value,
rebooted and TADAAA, there was the mouse cursor again and mouse was working.
It would be really interesting what ruined this entry and what was causing me all these troubles, but finally it’s solved at least.
System programmer