IPod, iTunes, and Windows XP Pro SP2

Question

I recently upgraded my computer from running Windows XP Pro (no service packs installed) to running Windows XP Pro SP1a, and now SP2.
While running SP1a, I connected my iPod (5th Generation video, 30GB model) to my computer, but it didn't appear in My Computer, nor iTunes. It was recognized by Windows, as noted by the "Safely Remove Hardware" option, as well as my normal "
"HI-SPEED in non-HI-SPEED" warning (my computer is running USB 1.1). I've also tried all four ports, and all four gave me the same response.
I tried connecting it again once I installed SP2, and again, same problems arose. I began trying to troubleshoot it by doing the Right Click on My Computer -> Manage -> Start/Stop iPod Service thing, uninstalling and reinstalling iTunes, repairing iTunes, using the CD I got with my iPod... nothing worked, and it's still only be recognized but basically unusuable.
The iPod displays the "Do Not Disconnect" message, and shows signs of being charged, so I know it can't be anything wrong with the connection. I've also connected it to my school laptop (running XP Pro SP2, USB 2.0 connection) and it worked perfectly fine, showed up in My Computer and everything.
I've even run iTunes, gone to Help menu -> Run Diagnostics -> iPod Diagnostics, and 3 of the 4 "lights" are green; the last one, "iPod Connection Status" is red. And that, of course, tells me nothing about why my iPod won't be recognized otherwise.
I've come to the conclusion that, under SP2, you can't use USB 1.1 but that makes absolutely no sense at all... could anyone help me out and give me any ideas as to whether or not that is true, or else what might be causing the problem?
Thanks so much in advance!

Answer 1

Just tossing in my experience quickly:
Ever since I "upgraded" to v7 of iTunes, my iPod (60G w/Video) hasn't been recognized, same as Rebecca. Also my TransFlash memory cards aren't recognized, either. I went through many steps listed in these forums, to no avail; I even did a repair install of Windows. I have noticed in my Device Manager the following: a yellow exclamation point beside "parport" and "serial". (Right-click "My Computer" > Properties > Hardware > Device Manager > View > Show Hidden Devices) For both of these entries, under their properties, it says this: "This device is not present, is not working properly, or does not have all its drivers installed. (Code 24)" I haven't found much info surfing the net as of yet... I hope this info helps a bit. Don't mean to hijack, here, either. But in my opinion the new iTunes upgrade corrupts the windows registry somehow, as this story of mine seems to be quite prevalent...