is it beg different between win7 and 8?
recently i am using windows7 do you think i have to get it changed to wind8?
Yes, it is a big difference in how you do things, but not necessarily better.
No, you do not need to change.
Windows 8 will boot faster.
That is a negligible point if you have a SSD. If you don't have a SSD, spend your money on a SSD first.
Past that, some users have a problem with the metro interface.
Personally, I hated it.