The next time you uninstall the game, try deleting the game's install folder (C:\AfterWorld Survival by default) and the game's cache files (everything in C:\Users\[name]\Documents\AfterWorld Survival\Cache), then reboot and re-install. If the problem remains the same, zip the files in the Cache folder and upload them somewhere (depostfiles.com, dropbox.com, MS SkyDrive, Google Docs, whatever) so that you can share them here.
And it would be helpful to know your PC's stats/components, like Thunderhead mentioned. Not all computers are able to play AWS, so you might just be out of luck for now.