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Hi,I'm sorry about the issue. Here are the answers:a) Yes, you can have more than 4GB of RAM memory if you have 64-bit Windows installed. Reference:http://www.crucial.com/usa/en/compatible-upgrade-for/Gateway/nv59-series
http://windows.microsoft.com/en-us/windows/32-bit-and-64-bit-windowsb1) Unfortunately, no, you cannot upgrade the CPU processor in this laptop (unlike desktops, usually you cannot upgrade CPU, graphics card, and motherboard for almost all laptops as it's all built-in.)b2) Memory does not depend on CPU processor; as long as the motherboard supports more than 4GB and Windows has 64-bit; this laptop's motherboard does support a maximum of 8GB RAM memory.c) CPU processor cannot be upgraded on this laptop.d) This laptop does not have any lighted keyboard for it. You can use a USB light if you'd like to:http://www.amazon.com/Bright-Light-Reading-Laptop-Flexible/dp/B00D5NOBZ4/e) Click on the website below for the laptop's manual:http://tim.id.au/laptops/gateway/gateway%20nv59.pdfDo you have any further question? Please reply at the box below. Thank you.
Also, if you really need a faster CPU processor, etc., then you can purchase a faster laptop you want, then you can purchase a USB fax modem if you are okay with connecting the external fax modem to the laptop.
Do you need anything else for now? Please reply at the box below. Thank you.