ever vaio has a recovery drive in in which is usualy hidden. to access it go to run & type in compmgmt.msc & tap enter, now a window will appare, in it on the left panel ther will be an opption "Disk Management" click on it, which will show
partitions of drives on ur computer on the right panel.........
Now look for an un-named
partition & right click on it & chose "Change Drive Letter" opption which opnes a window, now click on "Add" & give it a name by chosing an alphabet. this will make it appare the hidden drive in my computer at once from where u can access it.
to hide it back again just click on remove button where u clicked on add button....