This modem was in a compaq machine. Presario 5310us. PN on the unit is 47002-125. I got it from Hp's chat tech support. It works great with win98se..Should work fine with win98fe and win95. Just download the file to a spot on your HDD and run it. Then reboot your machine. Once windows finds your modem and installs; go to the modem, click diagostics, then click more info..This tests the modem to make sure it works. Also make sure your bios irq setting does not conflict with the setting windows automatically assigns. I disabeled it in mine..it works great..Good luck.