I deleted all my hard drive partitions and formatted my hard drive to wipe it clean. Now when I try to install Windows 7 onto my computer, the DVD boots and the installation begins. The installation will complete the "Copying windows files" task in seconds, but sticks at 0% on "Expanding files" for about 30 seconds. I will then receive an error that reads "Windows cannot install required files. The file may be corrupt or missing. Make sure all files required for installation are available, and restart the application. Error code: 0x80070017". I researched this error but couldn't find a resolution. One suggestion was to download my hard drive's drivers onto a pen drive and load them in the installation, but this didn't help. I also tried installing Windows Vista and received the same problem. The error in this case has nothing to do with the copy. I have used many different Windows 7 builds, many different DVDs, burning at different speeds, all producing the same problem. Only when using the Windows 7 RC disc I was asked to "load drivers" as a requirement. Other builds didn't require me to load drivers. I really don't know what to do, I just want to get my computer up and running again!