In late 2007, I bought a lap top using Vista, with 1 GB (2 x 512 MB RAM sticks installed) of DDR 2 667MHZ. I only really use the lap top for general internet use, and word processing/printing. Even though Vista uses (takes up) at least 512 MB of RAM, I have been told that despite non intensive use of my lap top (graphics, games, downloading video/s and audio) that computers using Vista, needs at least 2 GB of RAM to operate and run smoothly/well/optimumly. The Manufactuers Warranty (Hewlett Packard) that went for 1 year, expired in late December 2008, and it is now under a 1 year extended warranty done by Clive Peeters and Lumley (An Insurance Company) I have been told that if I add (install) any other RAM (different to the original supplied by the manufacturer, that I will not be covered if (say new RAM I buy, causes something bad to happen to the computer) Is there any way I can get around this? I don't know that you can find or buy approved Hewlett Packard RAM from anywhere/Australian retailers, and even if you could, it would be much more expensive such as $ 119 AUD for 1 GB of RAM, rather than buying any other/alternative/cheaper brand of RAM from anywhere. If I install the new/additional RAM myself, that would void the extended warranty too would't it? Even if something did go wrong with the computer with new/changed RAM in it, and turned off/unplugged the lap-top and replaced the New RAM with the original RAM supplied by HP, the company/companies who I bought the extended warranty from, would still somehow tell that a technical problem wouldn't be caused the originally supplied RAM (by HP) would they? What cheaper sticks of RAM are good and reputable for HP lap tops/notebooks, and which brands of RAM which I steer clear of? I heard Zeppelin is a bad brand. I can't afford to spend $119 AUD (or anywhere that sum/amount of money) on RAM