How do I go about installing windows after linux is already on my hard drive?

I am going to have to follow this thread. That is a very good question. I run mainly Linux on all my machines. I know it is fairly easy to install Ubuntu Linux inside of windows. I would have to ask what format is your hard drive file system. In order for windows to install there would have to be a NTFS or FAT partition. I know with a partition manager you can create new partitions or format old ones. The only problem is you will loose any files located on the new partition. I don't now if there is a way to move them before creating or formatting a partition . Hopefully a guru will come along and answer your question, I would really like to know as well. Excellent question! I will be following along.

you'll need to partition your harddrive into to.. (eg: C, D) then install 2 OS on different partition.. every time you'll boot your PC, you'll get a menu that indicate to choose what OS you want to use.. ^^ goodluck.

The best way is install windows first and install linux say like ubuntu. This will giive a dual boot option on start of pc. the next choice is to partition Hard drive with 2 smaller partition and install one os on each.

here is what would i do for double o/s system. get them installed on two different hard disks. HD been so cheap and large in capacity you could easily have 2 massive OS on separate HD. to switch between tow you would need to set it up from BIOS.