I am having linux mint 10 operating system installed on my system. I would like to know if I can have windows Operating system (such as Windows 7) running on my system(as the second operating system).

I would like to know if I can have these two operating systems on my system simultaneously so that I can use one operating system at a time

Sure, you just have to restore grub2 to the MBR after installing win7.

This should help

http://ubuntuforums.org/showthread.php?t=1014708

and a general grub2 reference

http://ubuntuforums.org/showthread.php?t=1195275

That configuration is called a dual boot.
If you install Win7 first (or it is already present), THEN install linux, you will find that grub notices both and you will not need to mess with the MBR.

The better solution is to load mint, add VirtualBox, and install Win7 into a virtual machine.
Then you get to run Linux and Windows AT THE SAME TIME!

That is, in my experience, the BEST way to run windows. EVER!

1 members found this post helpful.

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Hi, I've done this before. What I did was, when I boot the Linux Mint Live CD before installing anything is set up the partitions; in my case I have a 160 Gb HDD and I used 90 Gb of the whole disk for Windows, so I partitioned the HDD and left a 90 Gb Space without asigning any format to it, in the other 70 Gb I created a new space of 1 Gb apart from those 70 Gb for using it as a swap space and formated the left 69 Gb with the ext4 file system format and aborted the installation of Linux Mint. Then I rebooted my comuter and installed Windows 7 Ultimate in the 90 Gb space that I had left without formating, after I was done with all of that, I mean installing Motherboard drivers an antivirus software and other stuff that I usually need to have I procceded to reboot my computer one more time but with the Linux Mint Live CD to install it ot the ext4 partition that I had made before, that way you don't have to restore grub2 to the MBR after installing Windows 7 like andrewthomas has told you before.
I hope it helps and also that it's not too late to come with this answer. Anything you want to ask if I'm not really clear with what I'm saying here just ask it.
Good luck.