I want to restore my system to factory settings.When I purchased my system it has Vista OS installed in it.Later I installed Windows 7 twice.Now if I restore it will Vista be my OS now?
I want windows 7 to be my OS.
If the original recovery partition still exists, that would contain Vista and that is what you would normally restore. But if you installed Win7 later, you must have the Win7 installation disc and can use that.
I bought the win7 disc.Actually I had a problem with my system and I formatted it with win7.
Is restoring better or should I format my system again?
Because some say formatting too many times spoils my hard disk,and I had already formatted twice.
Formatting your disk doesn't destroy it. It's merely a matter of rewriting. Of course, it wears your disk, but moderns disks can take a lot. I wouldn't be concerned about that, we still have disks from 1980's working properly.
But usually it's better to make a clean install than an upgrade. Since you don't seem to be sure of what you have, I would suggest you start on a fresh base; safe copy what you have, and use the Windows 7 installation disc whs mentions.