I have a GSA-720L ATA Device in my laptop which becomes inoperable when I download ITUNES does anyone have an answer to this. The Laptop is a HP Compaq 6720s
A search on the forum shows that this may be a problem with your upper and lower filters. Look in my signature for a link that says: How to Delete Your Upper and Lower Filters.
Once you click on that, it will take you to an article from Microsoft. Either click on the Fix It button on that page, or follow their instructions for manual deletion, according to which operating system you are using.