Shadowprotect Desktop by Storagecraft.
Far Superior to any other I have seen.
Windows backup, disaster recovery and drive image software

I am using dropbox for my back up,though it is not like that ,but I am tension free.
Suggest me or give me for your best.

I recommend Norton Ghost

No offense, Shadowprotect is far superior to Ghost,and I have used both. Admittedly I haven't used ghost in a few years, but I stopped because it had dropped in quality even back then.

I dont use backup software. I do manual backups.

I'm a big fan of backup software and services, I have used several backup programs for years, and I recommend Handy Backup 7. It's the best backup software I ever used.