What I am linking below is free software and utilities to DL and install on your PC. These are legit and highly recommended by one of my instructors who works in the IT security business. I am posting this due to the fact that there is a MULTI-PLATFORM virus that is going around and infecting all OSs. So be careful!
The Belarc Advisor builds a detailed profile of your installed software and hardware, network inventory, missing Microsoft hotfixes, anti-virus status, security benchmarks, and displays the results in your Web browser. All of your PC profile information is kept private on your PC and is not sent to any web server.
As a bonus for you Mac users, here is something that you may want to look into (there is a similar version for windows PCs somewhere): http://hiddenapp.com/
My instructor also suggested TruCrypt (WARNING!!! be sure to to read and understand what you are doing when using this software, as you may inadvertently encrypt the entire HD. Also if you forget your password, the software can nuke the contents of the HD): http://www.truecrypt.org/
Creates a virtual encrypted disk within a file and mounts it as a real disk.
Encrypts an entire partition or storage device such as USB flash drive or hard drive.
Encrypts a partition or drive where Windows is installed (pre-boot authentication).