Signed drivers became unsigned

[mjwiech]

My system: Dell Inspiron 640m, WinXP SP3.

I noticed that many files in \windows\system32 directory became "unsigned"
while
they ought to be "signed" (I checked this on another machine runnnig the
same version of XP).

Among them are, e.g.:
usbmon.dll
usbui.dll
usb8023.sys
usb8023x.sys
usbcamd.sys
usbcamd2.sys
usbccgp.sys
usbd.sys
usbehci.sys
usbhub.sys
usbintel.sys
usbport.sys
usbprint.sys
usbscan.sys
usbstor.sys
usbuhci.sys
usbvideo.sys

What can I do to make them "signed" again? I suspect they give me a lot of
troubles when inserting a new USB device, because then the "add new hardware
wizard" appears, asks a lot of questions, creates restore point, complains
about unsigned drivers etc. Installation of standard USB devices, like
memory, mice etc should be seamless and automatic, right?

Thanks a lot for any help.

Regards
mjw

 

[Leonard Grey]

Rather than getting into a discussion about signed and unsigned drivers,
please describe as specifically as you can the problem you are experiencing.