I'm running: Athlon II X2 250 3Ghz ATI Radeon HD 4300/4500 series (don't know which one exactly, that's what I get from msinfo) MSI 760gm-p21 motherboard 4 GB DDR3 RAM WD 640GB HDD I only use my computer for browsing the internet and watching videos, no gaming or anything demanding like that, although I often have multiple 100s of tabs open. The computer has been very slow at times, it gets into these bouts where it just hangs when I want it to do something and HDD usage goes to 100% (I think because all RAM is taken up so it starts paging stuff out to free up RAM). I'm very short on money and want to spend as little as possible, so, within that constraint, what do you think I should do? Do you think an SSD for Windows and programs would help me more or an additional 4 GB of RAM? I figure RAM would be more important, but I don't know whether I should be buying more DDR3 (rather than DDR4) or is Win10 going to become more demanding with another year's worth of updates and DDR3 isn't gonna be enough, or should I be good for many years to come with 8 GB of DDR3 (and with what I use my computer for)? I looked up my MB on MSI website https://www.msi.com/Motherboard/760GM-P21-FX/Specification and it seems to me from this that it doesn't support DDR4, so I assume if I wanted DDR4 that would mean a new MB too, but would that necessarily also mean I'd need a new CPU? Could I find a MB that supports both DDR4 and my CPU, if I decided to spring for a new MB? Ideally, I'd like to buy just 4 more GB of DDR3, do you think that should be enough for the next several years?