I am running Widows 7. I downloaded Photo Gallery and Movie Maker. When I try to open Movie maker (I'm not worried about Photo Gallery) I get the following error message

Wlstartup.exe- Entry Point Not Found

The procedure entry point ?OnGetMaxInfo@MAE_NIJAAJ@Z could not be located in the dynamic link library UXCore.dlll.

Can you help please. 
I downloaded Photo Gallery and Movie Maker two days ago. Photo Gallery worked fine, but Movie Maker still doesn't start. I have looked through the system requirements: We have Windows 7 32-bit version, 1 GB RAM, 2.20 GHz, Internet Browser is Chrome, Internet connection is broadband, we have DirectX 11 installed, and both Photo Gallery and Movie Maker are downloaded.
As for the internet browser, we also have Firefox 3.0.1. We also have Media Player installed.

I opened Movie Maker, it appeared but it said "Not Responding" and closes, then this message shows up, and says:

"Sorry, Movie Maker can't start. Make sure your computer meets the minimum system requirements before trying to start Movie Maker again, and then try to update the driver of your video card if Movie Maker doesn't start."

Oh, and just in case this is important, our computer is HP Pavilion a6540d.