Missing drivers for common devices

Hi,
I'm running WinXP64 and lately, it's been having problems recognizing devices like a new HDD, flash drive and optical drive. I have a new HDD connected along with an optical drive and every time during start up, I get a dialog box for each indicating new hardware and needs driver installation. If I click install, it always fails to find one so I usually cancel it. However, I can fully use said HDD and optical drive. I also have other HDDs connected prior to this and they're not causing any problems.

I've also plugged a flash drive recently and windows fail to recognize it. In fact, it's listed as "Other devices" in the hardware manager. Correct me if I'm wrong but I assume that WinXP should have these drivers built-in. So I'm guessing I need to repair it and if so how? If not, what's my next course of action? Btw, I'm also running Nod32 and in the past it has recommended that I delete some files which I usually comply. I can't recall but I might have deleted some system files along the way.

Any help and suggestions would be appreciated.
thanks!