Unnexpected conversion

Hey all

I have noticed something quite odd over the past month or so in my MBSA reports and logs. Apparently one of my client PCs running windows XP pro has converted its file system to FAT 32 all by itself. I know its strange but it seems to be the case.

I had another client PC do the same not so long ago too… both of these PCs are very similar, but I know for a fact that they were installed with NTFS partitions and windows XP pro. Is there any known issue for random conversions like this? This one truly has me baffled