Quote: Originally Posted by Ealezy1992
i had the same problem. In the morning i had 4gb of ram installed and working by evening only 3 working (4 showing). Now i had installed updates earlier today so i thought that might have something to do with it. i tried a few solutions on here nothing worked for me. i checked bios, it was fine. when I restarted my pc msn started so i went into msconfig to switch it off in startup(type msconfig into run) out of curiosity i clicked on boot-> advanced options and for some reason the box maximum memory was checked. so i unchecked it and restarted and now i have 4gbs again. I think one of the security updates must've have ticked the box. But try this anyway, i hope it works for you
THIS WORKED FOR ME! Thanks!
I have 12GB and Windows 7 x64 Ultimate was only showing 10GB usable. I unchecked that box in msconfig and restarted the computer, and now it's back to normal (All 12GB of RAM is available now). Thanks again!