My camera wont work on my pc anymore

Hello,
hi i am having a problem getting my digital camers to work on my pc it used to work on here through my usb cabel but now when i plug it in it is detecting a camera but the hardware installation wizzard box pops up and can't find anything. the camers diddnt come with a disk to install it it just used to come streight on i think something may have been deleted do u have any idea what it could be.