I downloaded Windows 7 Professional 64-bit online and ran the executable (I am running inside of Windows 7 Ultimate 64-bit RC version) . It created the expandedSetup folder and opened the install window. The only options I have are 'Install' and 'What to know before installing Windows'. If I click 'Install' I get the following error message: "Windows Setup cannot find a location to store temporary installation files. To install Windows, make sure that a partition on your boot disk has at least 814 megabytes (MB) of free space. Error code: 0x80070490" I have plenty of space on all my partitions. My drives look like this: Disk 0 Letter/Type: Size: Free Space: D:/NTFS 680 GB 396 GB SWAP 2 GB JFS 78 GB 61 GB JFS 15 GB 10 GB C:/NTFS 156 GB 97 GB (has Windows 7 Ultimate 64-bit RC installed) Disk 1 Letter/Type: Size: Free Space: -/NTFS 100 MB 72 MB (System Reserved) Unallocated 700 GB I do not have the installation discs, just the download files, and I can not burn an ISO to disc because there is no ISO. I am not sure how to proceed. Thanks for any help you can give me.