When you sync an iPod in Windows XP, you may get the following error:

The iPod “name iPod” cannot be updated. An unknown error occurred (-50)

To solve this problem, try the following:

1. Click Start > Run and type regsvr32 softpub.dll

2. When you receive the message that the DLL has been registered, click OK and perform the same steps for each of the following commands one by one under Start > Run:

regsvr32 wintrust.dll
regsvr32 dssenh.dll
regsvr32 rsaenh.dll
regsvr32 gpkcsp.dll
regsvr32 sccbase.dll
regsvr32 slbcsp.dll
regsvr32 mssip32.dll
regsvr32 cryptdlg.dll
regsvr32 initpki.dll