Every now and then my PC gets a little clunky. Windows will gets a little slower once an installation of it is a bit long in the tooth. One really handy application that a friend recommended to me was Belarc's Personal PC Audit software.

It will create a log of all the applications and serial numbers on your system, which is great if you keep re-installing your operating system (I'm always forgetting which applications I'm running).

Along the same theme Acronis have just released the newest version of their backup software. True Image Home 2010 is Windows 7 compatible, and gives you a wealth of backup options, from full disk images to specific files. What most interests me though is the 'Continuous data protection' option. I've been used to team members working on Macs using 'Time machine' online continuous backup software, and this appears to have very similar functionality.