Any resolution to this? I had similar crash when scanning a large library from a NAS (network drive). Same exact setup worked fine in Desktop MM in Windows 7.1 for many years. It scans alphabetically, or in the natural order of the album folders. So if you go to the last file, you will probably see ...

MM8 (Metro MM) crashes in the same place on a large 30K track library scan. I happen to have both Surface RT and a nice Haswell ultrabook running Win 8 regular with 8G. It crashes at exactly the same place in both, so unlikely to be memory or environment issue. I did file a case and send MM support ...