Thanks for your replies.
still i face the same issues. If i download it from a windows machine, i can download it in winrar option.
so i downloaded from my ubuntu, here i was able to download the same link as iso file. but after burning it to dvd and pen drive, i was not able to boot it showed boot error.
i bought dell inspiron 5520 few days back, which had ubuntu11.x. In that wifi was working fine but i was not able to download and install any softwares, so i downloaded ubuntu12.10 and installed it. In this version, wifi was not working but all other softwares were working fine. I tried all possibilities but couldn't fix it. so at last i thought of downloading linux mint and i faced these issues. And now at last i have given my system to install windows.
I really wanted to have linux os
I have got a linux mint windows installer so planning to have a dual boot.
Does dual boot has performance issues?