*BUMP* - I Realise this is an old thread - But it just came in VERY useful - Thanks to Wixzard for his comment!
I had exactly the same issue as Lou P, where touching the Caps Lock key would pull me out of the game I was playing (WoW, BF3, NFSU, Etc...) and as Wixzard stated - turning off the BTTray.exe process and disabling the BT device worked great - no more game drop outs.
Thanks guys.
Hope this helps others!
Opening the Bluetooth app and then disabling Bluetooth and telling it to go away should suffice; no need to kill the process. I have a Dell laptop running this but it never was an issue for me, so I find this problem kinda odd.
In any case, you can safely turn off Bluetooth and only turn it back on when you need it.
The games are being interrupted when the caps lock notification pops up and takes the focus away from the game window. If you have an HP computer, to disable the caps lock notification, search your registry for "hpCaslNotification". Once you find it, locate the string
1. Start
2. In the run/search line type REGEDIT
3. In registry editor select the Edit drop down menu and then select Find, enter hpCaslNotification and search until you find the following string hputils.hpCaslNotification.1
4. Double click on the string and change the value to hputils.hpCaslNotification.0
5. Reboot and the notification will be off.
Using this method you will only turn off the notification and not disable any other features such as bluetooth, etc.
Quote