I have windows 7 and I need to install software to add several utility functions. All software must be virus and add ware free, compatible with windows 7 and my preference has always been for shareware and freeware software. I do not mind paying for the software if I can try it first. I have Norton Ghost for backup, and C Cleaner for registry and clan up functions. The next thing I would like to add would be disk De-fragmentation. Where do you go for utilities for Windows 7? What software would you recommend for Windows 7 De-fragmentation?