Back ups!!

[shyamno]

If suppose I want to format my computer (a.installing same OS b.installing different OS),then I should go for backups.But I don't know what and how to back up.Does I have to backup only the C drive which is my physical drive.

Also I want to know after restoring from backups can I get the windows update which I had installed initially.If yes ,then how.

Similarly,other programs which I have updated online,can I get them back after restoring from back up files.

[Apollo]

Assuming you're using Windows XP as your OS:

http://www.microsoft.com/windowsxp/u..._03july14.mspx