Windows XP does not natively support it. You need the specific driver version 7.6.1.161 or newer. The Sorg pack includes it. On Windows 7 or 10, the driver exists but may require forcing the install via “Have Disk.”
The Acer Aspire One ZG5 Driver Guide: Keeping the Netbook Classic Alive acer zg5 drivers
Need drivers for your Acer Aspire One ZG5? Whether you’re reinstalling Windows XP or trying Linux, here’s where to find safe drivers and how to fix common issues. Let’s be honest: The Acer Aspire One ZG5 is a legend, but it’s also ancient. Released in 2008 with an Intel Atom N270, 1GB of RAM, and an 8GB or 16GB SSD, this little netbook wasn’t built for Windows 10. Windows XP does not natively support it