Need massive help JScript not properly registered-But it IS.

[Burden]

I try to run PS CS4 installer, and it tells me it cannot run because JScript is not properly registered.
So I google up a bit, and I find the regserv command to register it correctly.
I get an 08x0000 error, which I know is a permissions denied error, but I'm an Administrator.

So why am I being denied this?