can i install tow operating systems on my machine.

you can .. could you mention as to what OS u'd be runnin now ? Any OS released after 2000 would support multi-boot . you just need to install it on a different partition (although we can install multiple OSes in the same partition too) But please dont try installing an old OS over a new one .. like windows 98 over XP .. that would destroy all the boot/partition info and ud be left with just win 98

yes you can very well install two operating systems in your computer. you have to partition your hard disk befor eyou install two OS. one partition can have only one OS. we very frequestly use windows and linux togther in a same computer. no harm to do that.

Yes you can install two operating systems in your computer. In windows OS, just choose new install, instead of upgrade. If you want to install linux, it's always better to install windows and then linux, because windows just overwrites the mbr and ur linux wont be able to boot. Windows is being unfriendly to linux. But you can reverse windows has done to linux, but you ll need the linux bootable then just reisntall the loader you had installed for linux...

yes you can do the same without any problem. Just install the newer windows in the other drive than the windows which are already been installed.

It is very much possible & there is nothing wrong in doing so. But if you want to do so it is advisable that you do it ONLY if you know what you are doing. Get them in the wrong sequence & you end up with one lost OS. It is important you know which OS's you want to install.

yes u can install 2 o/s in a single machine for this u must have different partition for each windows or u can also install 2 windows in a single partition. for doing this u can contact me.

Yes, Read article about hot to manage partition and make dual boot. you can have more than one operating system in your computer.

Yes sure you can easily do this but install each operating system in a different partition and when you start your computer it will give you the option to choose between the 2 operating systems go on.

Yes of course you can do it, just make your hard disk divide into more than one partition, then install both Operating system into different partition you have made.