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#11
2 GB ram is the absolute minimum required for smooth Windows 7 64-bit experience according to Microsoft. Your system is only using 1 stick of 2 GB DDR2 hence your system will be on the slow side. Windows 7 64-bit generally occupies 1.2 GB of RAM alone. Keep in mind that when you use your browser (Chrome/Chromium is the most memory hog in my experience), it will use around 400 or more MB with a couple of tabs thus making Windows use a lot of pagefile writing which slows your PC down to a crawl. Adding another 2 GB of the same RAM should improve your performance considerably.