How to take complete back up of HTC Desire v Without rooting It

[Ani90]

Hello All,
I just want to know if there is a way at all to take complete backup of my android phone(HTC Desire V,ICS 4.0.3) without rooting. So far i don't know there is anything that can do my thing without rooting it. Now if i root and take a complete back up of my device, and then if i flash the stock ROM that is provided by HTC ,will then the phone will be restored to its locked state(unrooted) like now it is(I just want to tweak android and also don't want to void my warranty..).

Thanks in advance...