Can I upgrade the memory of any HP Pavillion computer notebook or can I only upgrade certain models?”
The HP Pavilion DV6662SE available on Amazon.com for $1,059.99 has all the specs you want. This HP Pavilion notebook comes with 2GB ram and can be upgraded to 4GB ram according to HP. However, the version of MS Vista (Home Premium) provided with this computer will not use all 4GB. HP documentation states “Up to 1 GB may not be available due to 32-bit operating system resource requirements” when installed with 4GB ram. The hard drive in this model is 250GB. However, HP states “Approximately 1024MB of the hard drive is dedicated for HP QuickPlay and will not be user accessible”. QuickPlay is the software used to watch DVD’s etc. included with this computer.