Save folder error - 2 user accounts - Only 1 is working ?

I have two user accounts on my computer. We both use Limewire, but one of us is constantly getting error messages saying the save folder is invalid. Whatever folder we choose, it keeps saying it's invalid. I have to uninstall and reinstall limewire every couple of days and it works fine for a couple of days and then the error comes back. Anyone have any similar problems or know how to fix it?

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There has been a recent 'spate' of others reporting what seem to be User Profile problems (as it is named in Windows).

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I'm running Vista and I have an Administrator account but the other user doesn't. I've shared the folder so the other user can have full permissions on it. We're both saving to the same folder but never at the same time. Currently I'm getting this message when I launch Limewire 4.16 on my administrator account: "Your save folder is not valid. It may have been deleted, you may not have permissions to write to it, or there may be another problem. Please choose a different folder." Whatever folder I choose now, I get this message. The other user is not getting this message right now.