I transfered my map from a windows 7 computer and onto a windows 8 desktop computer and it crashes when I load the map.

Put the summary of the bug you're having here

What I expected to happen was...:
Describe what you thought should happen here

What actually happened was...:
Describe what happened here

Steps to Reproduce:
1. Transfer map from windows 7 to windows 8
2. put the the save file in appdata's save folder
3. load minecraft and open map