One thing i have found on a few computers on my network around 7 out of the 458 i currently manage, Flash will fail to install, even a manual install it will Error 1722. Found a manual fix but worked on my 7 failing computers. If it was a bigger issue i guess i could make a script to remove files and reg data then install flash, but for now.
On the computer failing deployment:
Delete Flash Player files located in:
If you get an error or can’t delete the .ocx file don’t worry just leave the file alone.
Now open regedit and navigate to:
deleted all the REG_DWORD keys!
Now redeploy your flash package and it will install without error.