I solved the null pointer problem this way: find the real Microsoft games ( it located in program files on C in windows 7) copy it or download the pack from net. then rename it as Microsoft games2 past it in program files windows 10 ( it will not work if you click on any icon) reinstall the windows 7 games foe windows 10 and play.
I am downloading Windows 8 RTM using Microsoft's secure downloader provided by my school's DreamSpark account. The OS I'm currently on is Windows 8 preview. Once the download reaches 100%, it restarts to 0%. I open the download path folder, and find the en_windows_8_x64_dvd_915440.sdc file and the en_windows_8_x64_dvd_915440.scd.log file.
For Windows 8, Microsoft changed their policies. To download a copy of Windows 8, Microsoft makes the user go through some hoops. If you have a product key (I asume you do through Dreamspark) you may download a Windows 8 ISO directly from:( -US/windows-8/upgrade-product-key-only) 153554b96e