|stisvc.exe is a Microsoft Still Image Service.
?Windows Image Acquisition (WIA) enables imaging programs, such as Microsoft Picture It! 2000, Kodak Imaging, or Adobe Photoshop, to communicate with imaging devices such as digital cameras and scanners. WIA supports digital still cameras and both low-end and high-end scanners; it also enables you to retrieve still images from IEEE 1394-based digital video (DV) camcorders and Universal Serial Bus (USB) Web cameras.?