use FAT32 file-format and then keep defragmenting. Pluss what has been mentioned.
to get fat32, you'll have to reformat one last time :/
btw. every 8 months isn't too bad. I remember with my previous mother board i was forced to one reformat every month because winXP hated my motherboard. But then i returned to win2k.
If you don't like loosing your game progress/decuments. Get a 200GB or more external harddrive to backup on. (i'm waiting for the one i ordered, because my computer is hurting for a reformat).