How long does it take to install Windows 7? -

Depending on the speed of your machine. It took 15-20 minutes to install on my PC and thats with a 2.4ghz P4 CPU and 1gb RAM. LUG.

I installed Windows 7 and it took me around 45min to 1hr or so. I have a Dell XPS M170 Laptop with Pentium M 2ghz and 2GB of RAM.

Probably about 1 hour.

It will be different depending on the clock speed of the CPU.