My PC won't open itunes any more. It says "The iTunes library.itl is locked, on a locked disk or you do not have write permission for this file."

Perhaps this Apple KnowledgeBase article will help:

iTunes for Windows XP: "Disk is locked" or "iTunes folder cannot be found" when installing or opening iTunes

Regards.

I have the same problem. My library is on a NAS, I can access the nas, it isn't write protected. But Itunes simply won't start. I use win7, so the tip above for XP doesn't help. But I have removed the "music" folder assignment in windows, but that didn't help

If Dave's tip doesn't do it for you then perhaps this is the one you need...

Right-click on your main iTunes folder and click Properties, then go to the Security tab and click Advanced. If necessary grant your account and SYSTEM full control of this folder, subfolders and files, then tick the option to replace permissions on child objects which will repair permissions throughout the library. This is the XP dialog but Windows 7 shouldn't be too different.

If it won't let you change the permissions use the Owner tab to take ownership from an account with administror privileges.

tt2

Thank you, but everybody has full control on my NAS, have checked it. Is it really impossible to make Itunes start from scratch?? Btw - how do I give you pionts?

I guess System should be included in Everybody. The NAS might be the problem. How does it appear to the filing system, as a network path, a drive letter or have you tried to put a junction in place? The latter doesn't work for iTunes, I guess it uses the wrong system calls.

tt2

The NAS is mapped as a drive letter.

My first problem is to make it start at all. I re-installed, but that didn't solve it. Maybe I should uninstall and delete all itunes in the registry? I have deleted the Itunes database in the local my music directory, but it doesn't help.

Second problem it then to make it work with the NAS. It has worked, and I might have made an error that killed it.

But first thing first - to make Itunes make a clean start. Can you help there?

Hold down shift as you start iTunes, keep holding until asked to choose or create a library. Create a new library at C:\iTunes just to prove you can and that it will open. We can then talk about how to make sure it can open your library file (might be better on a local disk) and if needed how to reconnect the library to the media.

tt2

Thanks a lot, before your answer I deleted the not only the content of the my documents Itunes folder, but also the folder itself.. then Itunes at last asked for the location of the database, or if it should create a new one.

But I guess your great shift-key tip could have avoided that.

The odd thing - or maybe the root cause - was when I tried to make a new itunes folder in the my documents/mymusic folder, I needed administrative rights to do that, I didn't need that for the my documents folder..

Thanks a lot for your help. So how do I give you points? Or can't I, as I didn't write this question in the first place?

No you can't award points since it isn't your thread.

What version OS are you on? Vista/7 have all sorts of redirected folders some of which, as a user, you can't modify.

tt2

Thanks a lot this worked me! Do you what cuases Itunes to lose its Library to begin with? I'm running Windows 7.