Windows 7 home premium x64 installtion help

[Ffitchy]

Hello, I'm trying to install winows but when it comes to formating Partion 1 to do a custom install, the format option it greyed out and I can only delete it. Is there anything I can do to format it?

My current OS on the computer im stalling to: Linux - Ubuntu 11.10

 

[gregrocker]

Try deleting the target partition, then Create a new one in the same space, Format and click Next.

If Linux is on the other partition you may experience corruption of the boot sector blocking install of Win7. It's much better to have it on another HD unplugged during 7 install.

If not:
Dual boot Ubuntu-Win7
Dual-Boot Windows 7 and Ubuntu in Perfect Harmony - windows 7 - Lifehacker