Tried the tweaking thing, and a reg clean but still getting the same errors
Seriously? Oh, wow. How can that be?
New beta works?
Umm, actually, have you installed a version prior to r212.2? And it works or doesn't?
If it works, then I am stumped.
If it doesn't, then you will need to uninstall, and remove all trace of the software manually and try install again.
This is the worst kind of issue... and the problem is, that it might have started with construct2, but can start spreading to other software [No attacks you know of, no recent downloads, installs, firewall warnings, anti virus warnings etc] (I'm pulling at straws)
Sorry I'm not much help.... but this is weird... tweaking should have sorted all those issues