CSR Bluetooth 'Caps Lock' OSD notification mute

csr-caps-lock-osd-mute.reg

Windows Registry Editor Version 5.00

[HKEY_LOCAL_MACHINE\SOFTWARE\Cambridge Silicon Radio\Harmony\Default]
"OSD"=dword:00000000

gistfile1.txt

From: https://answers.microsoft.com/en-us/windows/forum/windows_7-desktop/caps-lock-notification-appears-on-the-screen-when/285a5edf-eb03-4e19-93c3-63e869486180?page=12
By jaaymaac replied on  June 2, 2015

I finally found the file in the registry that got rid of the notifications if you have a CSR Harmony Bluetooth dongle installed:
HKEY_LOCAL_MACHINE\SOFTWARE\Cambridge Silicon Radio\Harmony\Default
double click OSD
set value to 0 
restart pc
no more caps lock on / off notifications for me!

Thank you.

Thx.

Thanks!

you are my hero!

THANK YOU !!!!

I made an account just to say THANK YOU. You are awesome and saved me a lot of headache. Whoever put that crap into the Bluetooth software is stupid! Thanks again

PERMANENT FIX WILL WORK AFTER RE-BOOTING ENDING TASK ONLY FIXES UNTIL RE-BOOT
NO CODE EDITING JUST DELETE A FILE
I found a permanent fix thats better than ending the CSR OSD (on screen display) settings app. That program all it does is give that notification. So if its a pain, just ending task on "CSR OSD settings" is only a temp fix until you reboot. So I dug into it. CSR is silicon labs BT Driver, so if you have anything bluetooth, it has that driver and CSR OSD comes in the stackup. However I clicked properties on the CSR OSD task in task manager and found its associated .exe (vksts.exe.mui) in this directory address
C:\Program Files\CSR\CSR Harmony Wireless Software Stack\en-us
However you cant delete it while its running. So Ctrl + Alt + Delete -> Select CSR OSD Settings -> End Task.
Then go to
C:\Program Files\CSR\CSR Harmony Wireless Software Stack\en-us
And delete vksts.exe.mui and you have a permanent fix that wont change when you re-boot the system

Hope this helps someone as the microsoft answer doesnt work for me because everytime the update windows 10, they change the structure of the menu and a 14 month old guide wont have the options to click as described.

Thank you!

PERMANENT FIX WILL WORK AFTER RE-BOOTING ENDING TASK ONLY FIXES UNTIL RE-BOOT
NO CODE EDITING JUST DELETE A FILE
I found a permanent fix thats better than ending the CSR OSD (on screen display) settings app. That program all it does is give that notification. So if its a pain, just ending task on "CSR OSD settings" is only a temp fix until you reboot. So I dug into it. CSR is silicon labs BT Driver, so if you have anything bluetooth, it has that driver and CSR OSD comes in the stackup. However I clicked properties on the CSR OSD task in task manager and found its associated .exe (vksts.exe.mui) in this directory address
C:\Program Files\CSR\CSR Harmony Wireless Software Stack\en-us
However you cant delete it while its running. So Ctrl + Alt + Delete -> Select CSR OSD Settings -> End Task.
Then go to
C:\Program Files\CSR\CSR Harmony Wireless Software Stack\en-us
And delete vksts.exe.mui and you have a permanent fix that wont change when you re-boot the system

Hope this helps someone as the microsoft answer doesnt work for me because everytime the update windows 10, they change the structure of the menu and a 14 month old guide wont have the options to click as described.

they should just put all these shits as optional instead, thank you for this

Deleted the file as ajdetroit420 said - worked like a charm! I'm so happy this is fixed. Thank you.

Not a problem ive apparently helped 3 people. Worth the entire post.

Awesome thank you and @ajdetroit420 for the fixes. Who in the world puts so many useless stuff into a Bluetooth Driver?

Thank you very much, changing registry key OSD to 0 helped me.

Thank you so much! This was making me tab out of video games and I spent ages trying to figure it out. At one point I was literally going through task manager and ending any task I thought might be the culprit. I noticed the CSR bluetooth software running and briefly considered it, but then I thought nah... there's no way they would do something so obnoxious as include a random caps lock indicator with no option to turn it off in a BLUETOOTH stack. Clearly I was wrong.

thx very much for this solution !

Oh sir thank you, i just signed up on github to say that, Creator of all things bless you. No more stupid alttabs to desktop from games.

Thx

Thank you so much for this.

Thanks!

I lov U

Thanks a bunch! Bit silly how hard it is to find a fix for this until you find the actual culprit.

Why I dont have any of this settings or folder? Need some help.

@ajdetroit420 method worked for me, thank u so much!

Thanks. Can't believe I've been dealing with this in 2026 still. Appreciate the help