Have you rebooted your computer with the printer attached?
Check under printers to see if the HP 7150 is online and the default printer.
Resolving USB controller installation issuesIn Device Manager, USB game controllers are listed under Human Interface devices (in Devices by type view). If the controller does not appear in Device Manager, then USB may not be enabled in BIOS or EFI. When you are prompted as you start your computer, enter BIOS or EFI setup, and enable USB.
If USB is enabled in BIOS or EFI but the USB host controller does not appear in Device Manager (under Universal Serial Bus controllers), or a yellow warning icon appears next to the host controller name, then the version of BIOS or EFI may be outdated. Contact the maker or vendor for your computer and obtain the current version of BIOS or EFI.
If the controller appears in Device Manager, right-click the controller name and then click Properties. Problems and suggested actions are displayed under Device status. For more information, click Related Topics.
USB ports have a separate entry in Device Manager. To check the device status, click Universal Serial Bus controllers, right-click USB Root Hub, and then click Properties. If you do not see USB Root Hub, you might not have a USB port installed on your computer.
You can also use the Hardware troubleshooter to diagnose and solve problems with hardware devices such as USB game controllers. Start the Hardware troubleshooter.
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Thanks for the response. Yes, I did try rebooting, but no luck. I've since discovered that it appears that my USB ports aren't working since installing XP SP2. I went to the Microsoft site to download a fix, but get "error on page" when trying to accept the agreement. <<http://support.microsoft.com/default.asp...>>
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