Installing Modem on Windows XP Home edition

I have just bought Internet 5 (10G) together with an Huawei E173 modem. It works fine on my computer running Windows 7. When I try to install it on my husband's computer, which runs Windows XP Home Edition, I get a message

"The software you are installing for this computer
USB Composite Device
has not passed Windows Logo testing to verify its compatibility with Windows XP
Continuing your installation of this software may impair or destabilize the correct operation of your system immediately or in the future. Microsoft strongly recommends that you stop this installation now and contact the hardware vendor for software that has passed Windows Logo testing."

What should I do? Has anyone got advice for me or can recommend who can help me.

I am sure that the Telkom branch where I bought the package is not going to be any help.

Select "continue"

The modem was built long after Windows XP and therefore Windows XP is unaware about the devices authenticity.

So as stated, just select continue...