Citation :
# Click Start, and then click Run.
# In the Open box, type regedit, and then click OK.
# Locate the following registry subkey:
HKEY_LOCAL_MACHINE/System/Curretcontrolset/Control/Class/{4d36e965-e325-11ce-bfc1-08002be10318}
# On the File menu, click Export.
# In the File name box, type savedkey, and then click Save.
# Click the REG_MULTI_SZ data type UpperFilters, and then click Delete on the Edit menu. When you are prompted to confirm the deletion, click Yes. NOTE: If this data type is missing, continue to the next method.
# Click the REG_MULTI_SZ data type LowerFilters, and then click Delete on the Edit menu. When you are prompted to confirm the deletion, click Yes.
# Quit the Registry Editor, and then restart the computer
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tu reboot, tu vois ce qui se passe.