How to stop disk consistency scan

hi everyone, i got this problem.Everytime my window xp load,halfway during the loading, its will ask me to do a hard disk consistency scan on my d-drive.(i gt a 120 gb harddiak in 3 partition.C is my system disk)

i can chose whether to scan or dnt wan.So how can i stop the disk consistency scan.Sometime ,if i dnt wan to start the consistency scan.My pc will keep restarting.Pls help