How long does wubi take (not to download) but during the install after the windows reboot? For me it should be a short download (about 10 min) but how long will it take after?
Well this is a rather strange question since the answer has too many variables. The "normal" time should be between 5 to 15 minutes. I say normal when I talk about computers with 2GB RAM and a CPU around a Core 2 Duo. Normal in this time of technology. But some variables that will change the time it takes to install (Since the download depends on the connection) are:
For cases I had a slow install that took me 35 minutes on a Pentium 3. The fastest was on a Core i7 from a friend who I invited to Linux and that took 3 minutes (I went to the bathroom and when I got back it was done).
Also remember that what options you select in the install. It is not the same to install Ubuntu selecting all 3rd party hardware drivers, packages, etc.., and updates than to not select them at all. Installing ubuntu with everything selected will take a lot of time, not the 35 minutes I mentioned but more than an hour.
So like I said, a lot of variables.
It takes about the same amount of time to install as it would to install Ubuntu on its own partition. This obviously depends on the speed of your computer, hard drive and Internet connection.
Wubi just mounts a large file within your Windows partition as its own Ubuntu partition and ensures that the boot loader can remount it every time you boot into Ubuntu. Apart from that, its pretty much the same as a standard install.