Demo,
Googled the error code and found this:
Error -54 is a file permissions issue -
if you open the Start menu & type %userprofile% (including both % symbols) then hit Enter you should see the My Music folder, which is the default location for iTunes music files.
Open My Music, select the iTunes folder
Then, make sure you have sufficient control over the contents of that folder -
- right-click on the folder, go to Properties
- Security tab, Advanced..
- Permissions tab, Change Permissions...
- click your account name in the list, make sure it says 'Full Control' [if not, reply to that effect & we will need to revise this answer]
- check the box underneath for "Replace all child object permissions with inheritable permissions from this object"
- click OK. That should recursively give correct permissions right down the folder hierarchy.
Did all that and tried again - all sorted. Music is there!!!!!!