Yes, creating a regular system image backup is a good idea (I backup weekly), and Windows 7 makes it very easy: How To Use Backup and Restore in Windows 7
A laptop hard drive crashed the other day at work, and the owner is having to pay out the wazoo for data recovery services because she never backed anything up. Don't be lulled into a false sense of security just because everything seems to be working. You never know when the next hard drive crash, power surge, virus, etc. will catch you off guard and bork your system.
Edited by keyboardNinja, 16 July 2011 - 05:44 PM.