I managed a to install Win7 Professional in place of XP Pro. After, I realised that I had used my XP setup with sytem files in C 40GB and programs in D 100GB, both partions on the C drive. I decided that this might cause problems in the future and so I decided to repeat the custom install with C drive as 1 partition. Didn't spot an option to reformat C. The program would not install, error message 0x80070057. Searching the internet and Microsoft indicated that this an error associated with Explorer 2007! My C drive is 2 SATA drives setup as RAID 1. In frustration I reformated my 2 hard drives using my 2nd PC (running XP pro), cleared the CMOS and re-entered all required settings. So that I would have a clear fresh PC setup. I probably attempted 6 or 7 custom installations, each time getting the same message that the drive can not be formatted. Then I spotted the advanced symbol and dicovered commands for Format, partion, etc. Only by experiment did I discover that I needed to partition the drive for Win7. It seems that Win7 does not set up new empty drives automatically and no guidance given to the installer. XP pro installation does this automatically, perhaps Microsoft should look into this.
In-place upgrade from Windows XP to Windows 7 isn't supported. You need to perform a clean install. Generally, you can reformat and partition your hard disk during the clean install in “Where do you want to install Windows?” step. BTW, I noticed that you connected 2 hard drives to your computer, you'd better set the jumper correctly. It is recommended to install Operating System on the master drive. Meanwhile, the reason why you can't reformat the 2nd hard disk on another Windows XP computer is due to permissions. You may need to takeownership of this disk.
Microsoft is conducting an online survey to understand your opinion of the Technet Web site. If you choose to participate, the online survey will be presented to you when you leave the Technet Web site.