In Windows 7, you'll find it in... Start > All Programs > Accessories.
Yes. Go to "Start" and type in "paint"
It should already be installed if you have a Windows or Macintosh computer, however, I'm not sure if you need one for a Linux computer or not. Windows - Start > Search... > "Paint" Macintosh - MSPaint
There's no such thing as "MS Paint 2003." If you meant the Paint program from Windows XP and Windows Server 2003, yes. Just copy the program from a Windows XP or Windows Server 2003 installation to your Windows 7 installation.
Paint
Yes, it is possible. However, that is a very basic program and I would recommend something more advanced such as paint.NET or GIMP. Paint.NET is more user-friendly to those who use windows paint, but GIMP is more advanced. Just remember, the default texture size for each block in the texture is 16x16 pixels.
Memory
Yes, Windows is a multitasking operating system.
Koulourpaint. It depends on KDE however.
.png is the default extension of an Ms-paint file
There is not many out there, sadly. For Apple users, there is no other illustrator, but with Windows, the "Paint" program comes pre-installed and you don't have to lift a finger.
Microsoft Paint, commonly known as MS Paint, was developed by Microsoft and first included with Windows 1.0, released in 1985. The program was created by a team led by engineer and developer Chris Pranger. MS Paint was designed to be a simple graphics painting program for users, utilizing a bitmap format for images. Over the years, it has undergone various updates and improvements with different versions of Windows.
Try to go to your search system and type in MS Paint but if it doesn't pop up you might need to re-install it. But if it still doesn't work, your computer should already have a pre- installed paint program on it. I have used MS Paint and the pre- installed Paint program on my computer and they are both exactly the same thing except the tools are in different places which isn't a big deal, so if you don't want to re-install or if you just want the easier version, I would say just use the already installed on, I don't know if mac's have a pre-installed Paint program so if your using a mac you just gotta go the long way around XD