I am trying to install it on a brand new computer, and keep getting error 0x80070570. I found out that it might be a bad media, so I made a fresh copy from a disc that worked for me before, and kept getting the same error. I then just used the known-to-be-working disc, and the same errors came. I tried switching dvd drives, thinking it might be something in the hardware, but it didn't work. I downloaded the iso again (7 ultimate x64), burned it on the slowest setting. Again - error 0x80070570. What can be wrong with the computer? Can it be something with the hard drive? the motherboard? It is a Gigabyte GM-G31M-ES2C rev 1.1 - any known bugs with it? Or maybe some special bios settings I should use? The hard disc is some kind of Samsung 300GB. Anyone else have encountered those problems?
From what I've gathered so far; don't use a download manager to download your ISO, be sure to check the MD5 against the MD5 of the ISO you're downloading and burn using decent media at a slow speed. Anywho, google is probably a good place to find possible solutions.
find a 4 gb usb drive and make it bootable and copy /ectract files from iso to usb. and boot from usb and install 7.
Thanks for all the offers made. I have read the instructions on how to install win 7 from usb, and tried it using my iPod. It failed miserably (using the hp tool and the command line tool, ntfs and fat32). I did it after installing xpsp3 on the computer, and it kept booting to windows even when I set the usb as the only boot option in the bios, and tried various different approaches (using the f12 boot menu didn't work as well). I then gave up and tried again installing win7 straight from the dvd (same one that kept failing on me before), and it just worked like a charm. I think maybe it has to do with the fact that xp formatted the HD before, or made something in the MBR, or something. I have no idea, really. But now the computer has win7, and everything is fine. Thanks again for your effort.