NOTE: You, the customer, are solely responsible for data security. WinBook strongly recommends that you perform a backup of all personal data contained on your system prior to performing this procedure. Warning: WinBook will NOT be held responsible for any data loss incurred during this process.

The error message: "Rundll irprops.cpl missing entry Bluetooth authentication agent" appears when booting a system that had Bluetooth support installed before being upgraded to Windows XP Professional.

1. Configure Explorer to show hidden files by opening Local disk C in My Computer, clicking on Tools, Folder Options, View in succession, and selecting "show hidden files and folders", then click Apply.
2. While still In Explorer, find the folder C:\Windows\i386 and open it.
3. Locate the file Q323183_WXP_SP2_X86_ENU.EXE and double click on it. This should install Bluetooth support in the upgraded OS.
4. If prompted, restart the computer.
5. The error message should no longer appear.
   

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