Downloading takes hours:

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http://askubuntu.com – I have downloaded "ubuntu-12.04.1-desktop-i386.iso" and extracted it using magic ISO. There is a file wubi.exe is the extracted folder. To install ubuntu i double clicked it ( i am using windows 7); it asks the isntallaton folder and asks to create username and password. Then straight away it says it is downloading "ubuntu-12.04.1-wubi-i386.tar.xz". It it shows nearly seven hours of downloading time remaining (i have a slow internet connection). Can't i install ubuntu offline? Thank you in advance. (HowTos)