Unrelated Update Drivers

[RTG2]

Had 8 drivers shown by the Driver Scan needing updates. So downloaded them, only to find that 6 are totally unrelated to existing drivers in my system. For example, I got Sound Effects, S3 Tray Plus Utility, Elan Smart Pad, CPU HotFix, and so on. Nothing to do with update of the drivers that Device Doctor identified. Must I go direct to the manufacturers to get updates? Not to be overly critical, if so, then what is the need for Device Doctor? This is my first time at this, so appreciate your help. Thanks. RTG2