Windows 7 black screen with cursor

HP ZBook Laptop after windows updates boots to black screen, no start menu or task bar.

I ran appwiz.cpl from task manager and removed all the recent updates, still same. Also tried CCLeaner registry fix.

Anybody got any ideas that don't involve re-installing windows? Apart from missing interface I can run any program from Task Manager.



Can you run explorer.exe? this is the main interface exe. If you try running this it should restore the start menu etc...



Can you run explorer.exe? this is the main interface exe. If you try running this it should restore the start menu etc...



Restore to the last restore point and you should be good to go if the problem was created by installation of patches or software.



Most other things run, but not explorer.exe



Is it already running in the task list? If so kill all instances and try running it again.

If not then F8 on power up to access the repair options to see if you have a restore point as pointed out by paarun.



Ok, this is a known problem. Mostly, the cause are drive letters being mixed up. I know, you didn't change those, but it happens sometimes (very rarely) on its own.
Please use task manager to open regedit. Then navigate to HKEY_LOCAL_MACHINESYSTEMMountedDevices and delete that very branch "mounteddevices" and reboot. See if it solves the problem.

[no, this is not dangerous - that key gets re-created on next startup]

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