
Especially if you have used the Kazaa Codec, try opening the video, audio via the Media Player Classic. Media Player classic plays FLV (web based videos from say YouTube), most mobile phone formats, VCDs, DVDs, Read media, even raw DVD formats like VOB files.
The official site for the player is http://sourceforge.net/projects/guliverkli2/, but I find the best way to download the player is by downloading at http://codecguide.com/ or http://etplanet.net/download/files.php?cat=17. Not only will you get the player but almost every codec known to mankind!
If insist on using Aero Glass and all the special effects from Vista then you need a reasonably decent graphics card. Make sure the graphics card is at least 128 MB ram. When buying a new graphics card, you might want to consider the noise, heat and the power it consumes (so that you don't also have to upgrade your power supply).
Food miles is the concept of how far the food has traveled to reach you. The closer the miles are the less resources is consumed during the process. So instead of buying food from half way around the world consider some local foods. Generally this means buying in season for perishable goods.