Friend of mine bought a Dell laptop without Windows so it came with Ubuntu instead. Now he'd like to install Windows 7 x64. Here's how the partitions look currently:
Name Total Size Free Space Type
Disk 0 Partition 1 39.0MB 38.0MB OEM (Reserved)
Disk 0 Partition 2: OS 5.0GB 3.9GB Primary
Disk 0 Partition 3 289.1GB 0.0MB System
Disk 0 Partition 4 3.9GB 0.0MB Logical
So how to proceed? Shouldn't touch partition 1? Just delete partition 2, 3, 4 so you get this one unformatted space where you choose a smaller size for the OS and then later in Windows format the rest?
Also when you decide to leave OS on its own partition and installing all the apps and stuff on another one then what about the Program Files folder? That still stays on the C:\? So you just manually create Program Files folder on another partition and start to install there as all the software still defaults to C:\Program Files\ that you have to manually change every time? Or what about AppData folder or Temp folder? Programs still going to put their files there on the C: drive? Basically when people talk about leaving OS on it's own partition does it then mean that they somehow move some system folders around too?
Assuming you don't care about any data currently on the drives, I recommend booting to the Windows Installer, dig through the installer repair functions until you reach the actual menu, and launch command prompt. If by chance the repair tools will not allow you to move to the menu due to issues on disk0, you have to delete the OS partition through the GUI first. The following is what I’d write into the command prompt on a drive that size; change things up as you like (do not include anything on a line once you reach #):
select disk 0
clean #(This will entirely destroy all partitions on the disk and zero wipe the MBR)
create partition primary size=1500 #(1.5gigs, required to enable bitlocker. Only use size=200 if you know you'll never use bitlocker.)
format fs=ntfs quick label=BootMgr
create partition primary #(claims all remaining space)
select partition 2
format fs=ntfs quick label=System
You don't need to worry about drive letters; just live with the defaults it gives you during install. After your done installing Windows:
BootMgr will not receive a drive letter (don't assign it one except for brief periods if it requires maintenance).
System will become C: automatically when you boot from it.