My IE 7 flash player just stopped to run one day and I got this message of tn_19166 error.

Look up on the Web and many others like me have same problem.

Try many many different ways but never have my problem fixed, but one day.. wallah.. and problem solved.

The problem:
adobe tn_19166 install error

To fix it, try following my step and good luck!

What are you going to do is to reset your registry permissions on Windows (Vista) in my case, this is my  registry screw up and prevent the flash from installing.

1. Uninstall Flash player from control panel.
2. Make a backup of your registry (is up to you, i didn’t do that)
3. Download and install subinacl.exe
4. Download reset.cmd (run it and it may take a long time) * you need to have administrative rights on your computer (accounts) in order to do it.
5. restart your computer and reinstall the flash player again and you should be happy now.