Found this from a guy who was getting the same error on XP, while installing an AIR app called Twhirl.

Quote -
Actually, I fixed this on my PC. I have WinXP SP3, and I run w/ reduced privileges. Even though i used "Run As Admin" to install Adobe Air, there wasn't a way to install Twhirl as an Admin -- I had to log out from my User account, log in w/ my Admin account, install Twhirl, then log out as an Admin, log back in as a User - and it all works.

The error message is cryptic. It might be nice to have some suggestions on how to fix this yourself.

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Renderosity forum reply notifications are wonky. If I read a follow-up in a thread, but I don't myself reply, then notifications no longer happen AT ALL on that thread. So if I seem to be ignoring a question, that's why. (Updated September 23, 2019)