Nobody has cracked WMA DRM yet. DRM protection can be removed only if you have valid licenses.

DRM limits the rights of legal purchasers. One can see the service being shutdown, have system failure, can't listen the music on his/her portable device.

Never ever buy DRM protected songs. You can buy DRM-free music at the same price!

buy.com is not responsible for your hard drive failure, but you should request new licenses from it. Many services allow you to get licenses several times ('coz obviously one can have new OS, upgrade PC, hard disk failure,...)