WORKS!!! Finally found a fix. I don’t know exactly what fixed it but it is related to Permissions and Ownerships that are messed up in Windows 7. The Google Plugin installer downloads the main msi file somewhere and when it tries to access it, it doesn’t have enough rights so it stalls with 1619 error.

1. Take ownership of your entire C:, I mean all your System Folders – Windows, Program Data, Documents and Settings etc etc. All the stuff that are hidden and system by default. Just Take Ownership of everything in C.

Google for that .reg file that adds a Take Ownership option in your right click menu. Make sure you are an admin. Right click each and every folder and take ownership.

** I couldn’t find out which folder the GoogleVoiceAndVideoSetup.exe thing uses, if you guys find out then just takeown that folder alone. **

2. Open Elevated Command Prompt.
Goto C:\
Type “icacls * /t /q /c /reset”

This resets all the ACLs and removes the problems with permissions and ownerships. ( or messes them up even more, but it Fixes the 1619 error!! )

** If you guys know which folder GoogleVoiceAndVideoSetup.exe uses for it’s temp download, then reset that folder alone. **

3. Install Google Video Chat Plugin.

Done! Took me 3 hours of googling to fix this. What a waste of time in the name of better security :-|