Windows 7 is detecting only 3GB Ram of 4GB installed
Click the link below to learn more about the topic in this thread:
https://ccm.net/faq/5826-windows-7-is-detecting-only-3gb-ram-of-4gb-installed
https://ccm.net/faq/5826-windows-7-is-detecting-only-3gb-ram-of-4gb-installed