My PC has 4.00 GB RAM installed and since I am using windows 10, I have noticed in the Performance tab of Task Manager, that the allocated Memory is not more than 3.0 GB out of 4.0 GB. Why windows 10 restricts? It doesn't use 1 GB available for it and I must use this 1 GB. Most of the times (or even always) My allocated Memory is in range of (2.5 of 3.0). Frequently I get the message: "Your computer is low on memory" and this restriction is causing many open applications to crash and even entire system crash and reboot/restart. I must solve this problem in any cost and if not then I must uninstall windows 10 and go back to windows 7. I need your help.