Don't feel bad. I have been here awhile and sometimes says really stupid things. Here are some of my observations.
Many people complain about Vista. But it was, and still-is, one of the best made operating systems for a personal computer. Yes, Windows 7 is better. But I would not recommend you throw away you investment.
The recommendation to put stuff on DVD-R is not just my own. It is the general consensus of users who have found their computers were getting full of stuff they want but seldom use. Highly recommended to transfer photos and music and videos to DVD-R for you personal archive.
With your 1TB drive you can many many backups of you OS of both computers. Pay attention to to the documentation*.
Do not assume you can just copy individual files from one place to another. That may seem to work, but can led you into bad habits.
Leave the recovery partition alone.
* I mean the documentation specific to the external 1TB drive. Some issues with these drives has to do with the habits of the users. Please look of the documentation that came with that model.
If you have lost some of the manual and the CD that came with it. Please look over the information at the WD site. With you model number and serial number you can get more help from them.
Of course CH will help you a lot. Still, you need to take advantage of all the services that WD offers for free to owners of their products.
Specifically, look over the backup software that came with the drive. It should explain to you the difference between do a backup of the system and doing copy of individual files.
http://support.wdc.com/Please come back here with you questions.