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4gb ram 1.94 usable already unchecked maximum memory
intel i5
lenovo 3491-A1G
nvdia quadro
500gb hard disk drive
windows 10 x64
says 4gb ram but 1.94 useable and in BIOS is says 2048mb ram installed please help me fix this problem. i have already unchecked maximum memory but it stayed the same and still only 1.94gb useable out of 4gb