Canon S100 drivers won't install in Win XP HE

I had the camera installed and working fine, until my system crashed.

I performed a clean installed of Win XP. Installed all the applications
again (a lot of them!) The only thing that now does not install is the
Canon S100 Digital camera.

After I connected to the USB 2.0 port the Windows Wizard sees it and install
it. It asks me for the Canon CD, reads the files, copies the files and
reboots. After re-booting the device has a yellow check mark next to it and
the Canon application cannot read from it.

I've tried to uninstall and install several times to no avail. I tried
looking at the Canon Web Site for an updated XP driver but they are not much
help either.

Any idea?

Eduardo