8GB memory available 3.99GB for hardware retention 4GB solution

        I started using the Windows 8 Upgrade Assistant to purchase the genuine Win8 Professional Edition according to the 98 yuan purchase of Windows 8 Professional Edition. However, when using the upgrade assistant to download the installation, it failed. Finally, the Win8 Professional system was successfully installed according to the full version of the tutorial (Windows8 Professional purchase/installation graphic tutorial) using the U disk installation method. But I

computer is 8GB of memory, the computer - but only 3.99GB of available properties display, 4GB is available, in addition to 4GB gone it? Finally found in the task manager! It turned out to be "4GB of memory reserved for hardware!" I thought there was no way. But I tried the solution.

upgrade operation on 32-bit Win7, Win8 Pro obtained is 32 bits. Everyone knows that a 32-bit system only recognizes up to 4GB of memory. The 64-bit identification can identify up to 128GB of memory. Finally, I found a place to download the 64-bit version of Win8 Professional released in August. It is said that it has been verified that the Win8 download in August and the October upgrade assistant automatically download the same thing.

focus began to say: If you have encountered 8GB memory only 3.99GB not only recognize 2GB or 6GB of memory and so this type of problem, you can go check in accordance with the following method, the problem can not be ruled out to see You are yourself, because the reasons for this problem are different!

First: First make sure your PC motherboard, CPU and other support 8GB or more of RAM, and you are installing a 64-bit system. If the motherboard does not support or you have installed 32, no one can help you.

second: the most likely way to solve the problem:

if there are four memory slots, each bar is 2GB:

four memory slots numbered (0,1,2,3):

first insertion slot 0 (a single memory must be inserted into the slot), to start, the system displays 2G. 1

then plug socket (single slot), to start, the system displays 4G. 3

continued insertion slot (slot 2 and the same channel), to start, the system displays 4G. Prove that the system does not recognize 3-slot memory.

The memory slot 3 changed to 2 slot, start, the system displays 6G.

last interpolation 3-slot memory, boot the system displays 8G. After

into the system "hardware reserved memory" almost on the remaining about the 10M.

If you are two memory slots two 4GB, you can try to exchange two direct memory slots.

If this does not work, then try the following approaches do not fly:

1. Update the boot BIOS2.Msconfig cancel the check or the maximum memory. 3. Try to enter BiOS to change the memory map 4. Try to change the frequency of the memory 5. Reinstall the system... Win8e (Win8e.com) Warm reminder: Detailed method online to find.