I understand what you are saying there, I am simply informing you of the facts relating to the error you are experiencing. You have an issue whereby the system cannot write an item to your disk (as stated in the message you posted). The general cause of this would be permissions, or the files still remaining on disk (usually with a different user)
I would suggest double checking this, as I just informed you how how many items you had installed, which I got from your admin CP that I was logged into.