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|03-19-2009, 12:33||#1 (permalink)|
Join Date: Mar 2009
Thanked 5 Times in 1 Post
Widcomm bluetooth driver and device not recognized after SP2 and SP3 - Solution
After many years of attempts I finally got it right. I own an Acer Ferrari 3000 since 2005. It ships with XP home edition - pre SP2. It comes with a built in Bluetooth device (not a pluggable USB) and uses a Widcomm driver. As soon as SP2 was installed (auto-update) the bluetooth device was not identified by windows and the blue led indicator stopped blinking. The device was not recognized by windows and did not appear in the hardware or driver manager.
I followed many threads - only a few were aiding me but none helped. The problem, to summarize, is that SP2 provides windows with a list of generic bluetooth drivers. The original Widcomm driver is not signed or authorized or recognized as official (whatever...) by Windows and Microsoft. SP2 installs system information files in the %WINDIR%\inf (typically C:\Windows\inf) directory, which are then compiled into binary (.PNF) files which tell windows which drivers to load. Widcomm is not one of them.
Once SP2 installed the bth.inf and related bthXXX.inf files under this folder, and the system was rebooted, this information (I am guessing here) is loaded to the registry and is virtually impossible to revert without tampering with the OS functioning properly. (Don't try it, take my word for it, unless you'd like to spend days of recovering and re-installations). My solution is to reinstall SP2, but prior to re-booting, rename all the bthXXX.inf files to bth.inf.old.
|04-06-2009, 16:52||#2 (permalink)|
Join Date: Jul 2008
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Thanked 189 Times in 52 Posts
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