I used windows 10 in virtual box for a few days and i fell in love with its beauty. Is there a ubuntu theme to make it look like windows 10?
Here are a couple of themes I found,unfortunately I could not find a windows 10 theme but
This one looks like win 8 desktop,flat windows, blue colour etc...
Based on OP comments this theme is not quite the same as a windows 10 one
This one is more windows seven than eight, but the description on the page implies that it install a whole pack of windows based themes and icons, so you might find something there.
You can also look at Gnome look, there are three or four win 8 themes in this search result.
You can get a nice Windows 10 theme by using a few individual packages.
GTK3 metacity theme: http://gnome-look.org/content/show.php/Windows+8+theme+By+Kunal?content=165937
Orion GTK3 theme: http://satya164.deviantart.com/art/Orion-GTK3-Theme-281431756
You will have difficulty finding Windows 10 themes due to it being such a short time since release, but the above should do quite nicely for the present.