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Windows 7: Windows not recognizing NVidia GeForce 8400M GT

11 Jan 2010   #111

Windows 7 Home Premium 32-bit

Quote   Quote: Originally Posted by rkeilty View Post
iHi Christina,

I have the same graphics card as yours on Sony Vaio VGN-AR51E and it can be done. Keep on trying. It took me a while but the results are worth it. I kept on trying and then it just loaded properly, as if by accident! Try this link, if you haven't already.. NVIDIA Driver - Convert from Desktop to Mobile (Laptop)
Make sure you have the latest DESKTOP driver from Nvidia to modify - though it sounds strange!

God bless

I wish I could try this, but for some stupid reason I can't even download the original driver from nvidia's website. I click search and nothing happens. Now, I've done it before and I got to the download page no problem. Why is this computer determined to drive me nuts?

My System SpecsSystem Spec
11 Jan 2010   #112

Windows 7 Home Premium 32-bit

Quote   Quote: Originally Posted by rkeilty View Post
iHi Christina,

I have the same graphics card as yours on Sony Vaio VGN-AR51E and it can be done. Keep on trying. It took me a while but the results are worth it. I kept on trying and then it just loaded properly, as if by accident! Try this link, if you haven't already.. NVIDIA Driver - Convert from Desktop to Mobile (Laptop)
Make sure you have the latest DESKTOP driver from Nvidia to modify - though it sounds strange!

God bless

I finally managed to d/l the driver from nvidia, but messing around with the .inf just isn't for me. It's too confusing when you don't know wtf you're doing. I guess I'll wait for another solution or whatever.
Thanks for giving me this link anyway!
My System SpecsSystem Spec
11 Jan 2010   #113

windows 7 64bit
doesnt recognize nvidia 8600m gt

Just installed windows 7 64bit and it doesnt recognize my nvidia 8600m gt on my alienware m15x need help please.
My System SpecsSystem Spec

12 Jan 2010   #114

windows 7 64 bit

Hi again,

Just in case you want to try my modified INF that worked for me, please find it attached.

You have already downloaded the latest desktop driver from Nvidia. It will likely be extracted in C:\Nvidia

Download my attachment and extract. Copy and paste NV_DISP.inf directly over by overwriting existing one at C:\NVIDIA\DisplayDriver\191.07\WinVista_Win7\English or wherever it is to be found.

Right click standard vga in device manager.Then click, Update driver software. Browse. Let me pick. Have disk. Browse. Now navigate to the same folder as before and double click on NV_DISP.inf. Hit ok. Reboot when done, if necessary. Enjoy your gaming!

God bless,


Attached Files
File Type: zip (12.7 KB, 309 views)
My System SpecsSystem Spec
16 Jan 2010   #115

Windows 7 - 32 Bit
Windows 7 32-Bit (x86) wont detect 8400M GT

This worked for me and I hope it will work for you.

Just so you know, this worked on my:

17" SONY VAIO Laptop
Model# VGARN520E
NVIDIA GeForce 8400M GT
Running Windows 7 32-bit (x84)

*Symptom: Your system reads "Standard VGA Adapter" or something similar in the device manager. You can't figure out how to make your NVIDIA card pop up. While you've already tried to download and install the latest drivers from NVIDIA, they wouldn't install, claiming that you didn't have the right drivers for your hardware.

After hours of going through the .inf file tutorial and only coming up with garbled graphics (I must've been doing something wrong), I found a much easier and less complicated way out:

*Open a window
go to "Computer"
go to "Local Disc C:"
go to "Windows.old" (If you don't have this folder, skip to end)
go to "Windows"
go to "DRIVERS"
go to the folder that starts with "Graphics Driver (NVIDIA),..."
run the Setup in this folder
follow all prompts
restart when done

By doing this, you are merely installing the older driver that made your card work on your previous OS, which was most likely Vista, right?

IF YOU DON'T HAVE Windows.old-

Windows.old, as far as I know, is a folder containing a lot if not all of the older files that your previous version of Windows used to operate. The presence of this folder usually results from UPGRADING from one OS to the next, example: Vista to 7.

If you don't have this folder, you must have either deleted it, or maybe Windows 7 was the first OS installed on your computer either from factory or from it's last C drive format (wipe). This means that you have one of three options. You could:

1. Tinker around on this website and learn how to download the right update, create and/or copy over the right .inf file, and do the whole tutorial thing. (This was beyond me really. I invested the time but all I got was garbled graphics after about 15 mins every time, which means I wasn't doing something right.)

2. If your machine is old enough to install Vista, you could back up ALL of your precious files onto an external hard drive, format your C drive, install Vista, CHECK THAT VISTA IS RUNNING/DETECTING YOUR GRAPHICS CARD, then upgrade to Windows 7, and SELECT WHICHEVER OPTION "UPGRADE" OR "CUSTOM" THAT LETS YOU KEEP WINDOWS.OLD, now that you're back at Windows 7, follow the steps at the top. This is a time consuming but surefire way to do it, so long as you know how to properly format and partition your machine, and install a fresh OS.

3. Continue searching the internet for other solutions, but you may only get so far.

Personally, I like the second option the best. There's nothing like wiping your computer and starting over. I hope this helps!

My System SpecsSystem Spec
18 Jan 2010   #116

windows 7 ultimate 32 bits

thanks torrentg you are really helpful?
My System SpecsSystem Spec
21 Jan 2010   #117

Windows 7

Hey there i have a 8600 gt instead of the 8400 in my Hp pavillion dv9700 any chance you could help me as well? :) same problem


If you could help it would be greatly appreciated followed the other parts of the instructions and it showed me that the card were in the computer but didnt add it to the devicemanager..

tha retard : /
My System SpecsSystem Spec
22 Jan 2010   #118

windows 7


i'm having a problem with my Compaq persario CQ50-211NR laptop. I have windows 7 ultimate 32 bit and i am trying to connect to an external monitor(synaps) It wont detect the VGA ports. (basically when i go to detect the monitor, all i see is my main laptop monitor, no number 2)

the device manager says "standard VGA..." etc.
the hardware IDS says

See and heres another problem, the reason i am using the external monitor is because i am waiting on parts to fix my laptop, part of the LCD cracked inside and i could barely see to get my hardware IDS, right now i am using another computer. I plan on putting the driver on a USB or CD and transfer it over, any tips and advice would be amazing.

My System SpecsSystem Spec
02 Feb 2010   #119

win 7 ultimate

Hi Torrentg, you seem to have it sussed.
Just joined so i need some help.
Have just started getting problems with win 7 and Nvidia drivers for 8400M GS. It has been running for a couple of months no worries
I have installed the latest driver from Nvidia Website and tried earlier versions as well and get the same problem, that being it shuting down with either a blue , black or multi color pixcel scatter, then either rebooting or just freezing.
i have read alot of forums with same issues and now am over it.

So some insight would be nice an the best results seem to come from here .
I am curently having to run in safe mode as it is to unstable to run normally.

Hp pavillion dv2533TX
intel 1.66GB
nivida 8400M GS driver 195.62
4gb ram

info on my card

My System SpecsSystem Spec
07 Feb 2010   #120

Windows 7

Hi there,

I have a sony vaio vgn-fz27g and i just upgraded it to windows 7 (64bit) but I cannot install my video card driver at all and windows doesnt let me use hardware acceleration or anything... I have a NVIDIA GeForce 8400M GS
intel 2.2ghz
3gb ram


I think this is what is needed to fix the problem? any help would be greatly appreciated!
My System SpecsSystem Spec

 Windows not recognizing NVidia GeForce 8400M GT

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