I have a problem running single player mission maps on halo ce. It freezes when I try to load any single player map. It doesnt freeze when I try running it on xp only on windows 7. I have tried reinstalling windows 7 once to resolve this issue but it still didnt work.

Are you talking about regular single player out of the UI, or custom singleplayer maps?

I am starting the maps through the console.

You have to type in the console "map_name a10" then let it load. After that, remove the console by hitting ~. If it doesn't work, then I don't know.

You could try getting a UI with a Single Player selection, like the following:

http://hce.halomaps.org/index.cfm?fid=4688

http://hce.halomaps.org/index.cfm?fid=5394

I typed everything right "map_name example", and it shows the screen like its loading the map. It will even eventually play music from the campaign level very slowly and repetitively. I downloaded one of the custom ui files with campaign support and got the same result. However if I run the original non-custom edition Halo I can play campaign. This problem only occurs on windows 7, if I switch to XP then everything works perfect besides the fact that I need a different Halo CE installation for it. Windows 7 is my main OS so it's a bit inconvienient.

Have you tried running CE in Compatibility Mode?

(If you don't know how to set it)

Right-Click on the Halo CE shortcut (or .EXE)

Select Properties

Click on the Compatibility Tab

Click the checkbox that says "Run in Compatibility Mode"

From the drop-down menu, select "Windows XP SP3"

Click Apply, then OK

Run Halo CE.

I discovered the real problem, it was a corrupt profile. It was corrupt in my windows 7 documents folder but not my windows xp documents folder.