FSX install problems!

[Thud]

I uninstalled FSX awhile ago and now it's back up and running. But on the default planes, the windows are gone! You can tell with the no glare and completely clear window area.
Also the right rear window on the Beech Baron (default) is opaque.
Also the windows on the VC of the UKMIL C-17 are opaque too.

Does anybody know why?

[Daube]

Have you installed the SP1 and SP2 ?

[Thud]

Yeah SP1 but my computer can't handle SP2.