Hi everybody! (Hi Dr. Nick!)

Wasn't sure where to put this so feel free to move it if I'm in the wrong topic.

I have been having this problem anytime I either do a urpmi.update or urpmi.addmedia. What happens is after performing either operations, when I re-boot my computer, my C: drive which contains my XP install, has been hidden and I have to use my Partition Magic floppies to unhide the drive again. It took me quite a while to figure out how to fix this problem as I thought that perhaps I had somehow managed to format my drive or erase it or something equally as stupid.
Anyone else had this problem and is there a way to work around it?
Thanks.

Mandrake 10.1 Official download
Dell Dimension L500c
dual boot w/winxp
ATI Rage 128
TVWonder
SB 64 PCI
Fuzzy dice and Dingleballs