right i am having a major problem trying to downgrade bck to 3.1.3 when i download the file for it i am getting a load offiles instead of the 3.1.3 ipsw file now my ? is tht do i have to been on a mac book to get the file i need or can i download one for windows and if possible can someone post a good link for the 3.1.3 for iphone 3gs when i download it i get manifest file dmd files and other files tht i dont no what are for so plz if u can help tht would be gr8 ..............thx in advance kenny1690

If you are using Safari on a Mac uncheck "Open Safe Files after Downloading" in Safari Preferences or use a different browser.

As freddybflash says, by default, Safari attempts to open files that it detects are in .ZIP format. Since .IPSW is really just a renamed .ZIP, you need to stop this behavior. "Open Safe Files after Downloading" is the option in Safari that you need to uncheck. This will allow you to save the file to a location as the .IPSW and not have it automatically attempt to decompress.

i am using windows 7 guys

OK, read my response - the answer still stands. Whatever browser you're using is opening the file as a .zip instead of saving it as a .ipsw. So, figure out how to make it stop.

If you told us what browser, I'm sure we could noodle through the help file and point out the option, but ultimately, here's the problem (irrespective of OS version, etc.)

Your browser is treating the .ipsw as a .zip file and opening it when you save it. Stop your browser from opening files you save. This will stop the problem.

internet explorer 8

Read my previous responses. Both of them tell you what you need to do.

Closing thread.