I have had the full compliment of additional RAM installed almost since the off. I do use the machine for updating three varieties of GPS and a ham radio operating system which I guess don't need to be done on this particular Windoze PC, they can't be done on my Linux Mint desktop (update utilities only available for Win or Mac OS) but I can work around this. I might check out the SSD but I am unclear about shifting the Win7 off the hard drive onto an SSD without cocking up the licence. The magic licence number label on the bottom of the machine has worn down to be unreadable....... The backup OS is on the D partition of the HDD, will this cause transfer/re-install problems?