Media Player 11 sound but no video

Help
This problem just started about a week ago.
My Windows Media Player 11 will not show video when playing. Media Center will not open either.I get good sound. This happened shortly after a windows update failed an install.
Windows update was installing an update to .Net Framework(I believe it was 3.0). The install failed(locked up) part way through and I had to shut down the computer and restart.
I have tried to uninstall .Net framework 2.0 and 3.0 through the add/remove programs in control panel, but it says "an error has occured and it might already be uninstalled."
When opening Media Center it says I need to install .Net framework 1.1.4322.
Is the net framework glitch causing my media player probs? What do I do about it?