Sounds like you are using your motherboard's integrated video adapter and it is using a portion of your main memory for the video adapter (128MB). You might be able to decrease the amount of video memory in your BIOS. You can also install a stand-alone (discrete) video card (this will disable the on-board video and give you access to the memory).
tell me systematically how to bring back 896mb ram to 1gb ram......
First, you should have started your own thread.
Second, assuming your system actually has 1GB installed and your on-board video adapter is using a portion of your memory, you can simply install a stand-alone (discrete) video card. That will disable the on-board video adapter and give your system memory back.