My computer won't recognize my ipod. I there

You haven't given a lot of info to go on here, but this is one possibility.

Ipod usually wants to be drive F. Unplug your Ipod from the computer. Follow these directions below. If you have something in your system assigned to F then reassign the letter. After you are done, reconnect the Ipod and see if that works. (These directions assume XP operating system)

1. Log on as Administrator or as a member of the Administrators group.
2. Click Start, click Control Panel, and then click Performance and Maintenance.
3. Click Administrative Tools, double-click Computer Management, and then click Disk Management in the left pane.
4. Right-click the drive, the drive that is labeled F and then click Change Drive Letter and Paths.
5. Click Change.
6. Click Assign the following drive letter if it is not already selected, click the drive letter that you want to use, and then click OK.
7. Click Yes when you are prompted to confirm the drive letter change.

went to apple store recently & had tech restore my 8GB i-pod touch restore (completely froze up and I couldnt get it to restore?). Now when I plug it into my computer (my computer and I-tunes) doesnt recognize that its even plugged in. Cant be the usb cable or the port because when I plug in my kids i-touches they work fine. I can still use it through wi-fi for the internet etc but no music or files on it?
HELP!!!!