This is a pretty old adapter now so support is only going to get a classic Windows laptop connected to the internet.
3com 3CCFE574BT LAN Driver
File: winme574.exe
1f26b492e57bffd8ad920c04b868cae0aec6019e3a1a0f69213008abe7f6226c
3com 3CCFE574BT LAN Driver
File: 3com 3CCFE574BT LAN v2.1.zip
43be78c4216f363c36a5619f0036b4a49f5ebd893acf1b5e47447734cd6e294c