Tip & How-To about Cameras

Web Cam in use by another application, Fix.

Ok to fix this dreaded problem see below.
1. Open regedit, Start>>Run>>regedit
2. Open the key: HKEY_LOCAL_MACHINE\SYSTEM\ControlSet001\Control\Class\{6BDD1FC6-810F-11D0-BEC7-08002BE2092F}
3. Make sure the value of UpperFilters contains ksthunk line. Add it if missing.

Some software will remove this Control filter. As well sometimes when programs are uninstalled they leave extra empty lines in the UpperFilters values for other classes, so go and manually remove them - otherwise some of the devices appeared with the yellow exclamation mark under Device Manager.

Hope it helps

Posted by on

Cameras Logo

Related Topics:

Related Questions:

1 Answer

how i can reuse the norton 360 v Its trial period is expired. Plz send me product key or trial reseter. special thanks

Please remove the existing version of Norton program from the control panel, then go ahead and delete all Symantec and Norton files from the computer's C or D drive.

After that, open your registry and first take a back up just in case anything get deleted by mistake.
Then delete all Norton and Symantec files from HK CURRENT USER, HKEY LOCAL MACHINE, HKEY USERS, HKEY CURRENT CONFIG.

You can click on the SOFTWARE folder in each class to find the Norton files if any.
To open your registry editor, type regedit in RUN command (windows key+R)

After that you can again install a trial version of Norton for 30 days.

Feb 05, 2011 | Symantec Norton 360 Full Version for PC...

1 Answer

cd drive not detected


Lets do this.

1. Close all programs
2.Click on Start, Run, and type REGEDIT and press Enter.
3.click HKEY LOCAL MACHINE - SYSTEM - Current control set - control - class - select {4D36E965-E325-11CE-BFC1-08002BE10318} - on the right hand side you'll find upper filters and lower filters entries - right click and delete both(Upper and lower filters) - restart your computer and hope this works for you,
Awaiting response.


Sep 08, 2009 | Acer Aspireā„¢ T180 PC Desktop

2 Answers

genuine microsoft solve problem

Activate Windows XP Without Registration "
1. Type Regedit on the Run Menu

2. Go to Hkey-Local_Machine/Software/ Microsoft/WindowsNT/CurrentVersion/

3. Select OOBETimer (Reg-Binary) and Press Enter. Now You will See a Set of 12 Keys.

4. FF D5 71 D6 8B 6A 8D 6F D5 33 93 FD
{just delete D6 (4th entry) and replace it with C4}

5. Exit Regedit.

6. Type "%systemroot%\system32\oobe\msoobe.exe /a" on the Run Menu (without quotes)

7. Select "Yes I want to telephone a customer service representative to activate windows".

8. Click Next

9. Select "Change Product Key"

10. Put these keys

11. Select Update

Dont worry about asking again to register , close that

Restart the system and repeat steps 6 to 11, now the process will tell you that Windows XP is already activated.

rate me

it will work for you 100%

don't forget to reply

Jan 07, 2009 | Microsoft Windows XP Professional With...

1 Answer

Carriage Jam Open door. clear carriage jam and then press ok to continue


To get rid of this problem you need to delete all the hp icon from printers and faxes.
then go to start--run--regedit--hkey local machine--system--current control set--enum--usb and delete the hp keys starting with vid_003 and vid_000 ,once done try connecting the usb cable...a new icon will be generated and issue will get resolved.

senior tech,HP

Oct 19, 2008 | HP Photosmart 3310 Printer

1 Answer

optical drive not playing

This may not apply but it's worth a shot....

Click Start > Run
Type Regedit in the run box.

Look for keys called "Upper Filters" and "Lower Filters" and delete any values inside those keys, then restart the machine.

Note: If using Vista, be sure to right-click Regedit in the program list and choose "Run as Administrator", otherwise it won't let you change the values of the key.

Hope this helps,

Jun 10, 2008 | Dell Dimension 4700 PC Desktop

Not finding what you are looking for?

203 people viewed this tip

Ask a Question

Usually answered in minutes!

Top Cameras Experts


Level 3 Expert

102366 Answers


Level 3 Expert

3287 Answers


Level 3 Expert

76164 Answers

Are you a Camera Expert? Answer questions, earn points and help others

Answer questions