WIndows 8 64bit - 3.4gb ram after windows update

Hey , this is my first post usually I find help in the forums without creating new topics , but this time i couldn't help myself .
I don't know if this is the correct sub forum .
I am running a Windows 8 Pro N 64-bit and after some windows updates the windows is registering just 3.44GB of ram when 4gb are actually installed . Both bios and cpu-z show the 4gb installed . The problem occured after installing updates and i suspect it's one of these -
Update for Windows 8 for x64-based Systems :
I had them for a while (about a week) ,  there was a problem and i couldn't install them right when i got them  . Yesterday i spend a few hours in here reading on problems with Windows update . Finally deleting downloaded files in the Windows\SoftwareDistribution did the trick , somewhat . I was able to download and install them but on small chunks 2-3 at a time . So that might be worth mentioning .There were also some security updates .
The most frustrating thing is before the update a had no problem what so ever . Who knows why i decided that i must install updates ...
I'll be grateful for any help !

edit: I forgot to list my system hardware :
CPU E5300 @ 2.6
motherboard ASRock G31M-VS
RAM : DDR2 2xKingston PC2-6400(400Mhz)
Graphics : nvidia GT640
The problem is fixed !
I activated the memory allocation in the bios . Now i have 4GB installed and 4 usable again . I even ran a 15 min stress test and it was able to use 3956mb of the memory installed .
The strange part is never changed anything in the BIOS settings since i installed win 8 on the machine , not to mention since yesterday ... How could that happen i have no idea .
I'm posting my solution if someone else tries to find help on similar subject .

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Question Info

Last updated March 24, 2018 Views 1,440 Applies to: