Satellite Pro C845-SP4337KL Windows 8 black screen and only mouse's cursor works

Hi,
In one Satellite Pro C845-SP4337KL with Windows 8 is happening that a black screen appears suddenly and only the mouse's cursor works.
If I connect a second display I have tow (2) black screens.
Control-Alt-Delete doesn't work.
If I move the cursor to the left corner the start menu doesn't appears.
The C845 responds throug the network to ping, and I can brow the disc remotly from another PC when the black screen appears.
The only thing I can do is to force the shutdown, and I lose my work.
After that I have to verify the disk integrity and try to recover my files.
This had happen twice.
Thanks for any help.
Cordially, Rafael Travecedo

Hi
I have uñgraded from windows 8 to 8.1 yesterday and i'm in a litle problem, similar than yours.
When loging in to my account in the principal page after starting up my PC, the password is accepted, but from tht point after, just a Black screen shows. Nothing else happens, except for the fact that my mouse cursor responds with no problem... But there is nothing I can do with a black screen and no buttons or links or desktop neither windows 8 or 8.1 start page..
Did you find any answer to your trouble?
Thkns. Hope that my reply could help, but unfortunetly I'm trouble myself...

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