
You can follow the link to your question: I would recommend posting your query in the TechNet Forums. The question you posted would be better suited in the TechNet Forums. Need to understand what causes this and how to fix the same. We monitor windows servers using pdh.dll and we receive "error PDH 0xc0000bc6:9-> the data is invalid" a few times. We monitor windows servers using pdh.dll and we receive "error PDH 0xc0000bc6:9 - > data are not valid" a few times in the meantime. Note A device driver is signed digitally can still be listed as an unknown device in Device Manager.įor more information about driver signing for Windows, see the Microsoft Web site at the following address: When you install a device driver and Windows detects that it is not digitally signed, you receive a warning message and the option to cancel or continue the installation this message only appears if your computer is configured to display a warning message whenever an installation program attempts to install a device without a digital signature driver. How to troubleshoot unknown devices listed in Device Manager in Windows XP See this Microsoft KB article and check if that helps. The signed data are perhaps crushed or damaged on the HARD drive. This is how I have to upgrade? I have five computers and two are 98 and 95 for some software. MS refuses to load software for printer Plug & Play, and Viewsonic monitor. I say yes, but the charger just an infinite loop, preventing the drivers to load. Says error message "software not signed" then demand load anyway?. Recently, MS windos XP sp3 fails to recognize the common plug & play devices.
