I don't have XP but someone else asked the same question a couple of days ago. What I suggested was have a look on your modem installation CD and you should find some free fax software. (generally supervoice) I use supervoice for sending faxes and there are no restrictions. The main problem though is if you want to receive faxes you must have your computer switched on and supervoice running. To get round that I use the service from Trinite which costs £23 per year and all incoming faxes come in to my email inbox, so I don't have to have my PC on to receive. Trinite is at click here Tiscali offer the same incoming service for free but you have to have an account with them. I am quite happy with Trinite which works out at £2? a month.