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Windows 7: Dell c400 Video driver issues...

15 Oct 2009   #41

Windows 7

Hi I have a Dell C400 model PP03L with following spec:
Windows 7 ultimate
1 Gb ram pc133
80 Gb HDD

I have followed the videos exactly but it just wont install the Intel Graphics Chipset (KCH) Driver in the last video.

I dont know maybe it wont work for ultimate version ?
I start with uninstalling the intel extreme drivers and then reboot and follow the videos.
Christobal do you tried windows 7 ultimate version too ?

Best regards Daniel

My System SpecsSystem Spec
01 Nov 2009   #42

Fix for Dell C400 and Windows 7 Ultimate

Hi All,

this has been a good thread to work with. I now have a working install of Windows 7 on my Dell C400 latop. I have 1GB ram and 250GB drive

Although the method used in the video did not work for me, some parts were handy. For example. The fujitus files are needed to get the windows 2000 driver.

here is an extract from another post i found for using the 855m driver on a D400. I followed the same steps as below, but i used the drivers supplied on page 2 of this thread. The actual 830M drivers in place of the ones detailed below.

Once more note: Dont use the 855 driver. Just use the 830M driver in place

all credit to this thread
Install 855GM Series Video Driver on Windows 7 - Tutorial


When installing 855GM Series video driver Windows 7 reverts back to Standard VGA adapter after restart. The problem is that 855GM Series video driver is not native for Windows 7 and it will always choose Standard VGA Adapter as native video driver. A lot of older laptops have this video chipset. I read a lot of tutorials on the net and nothing worked for me. So I figured out a UNIVERSAL way to get it to work, I think :)


The only driver that worked for me is: Intel(R) Graphics Controller . The reason why is that Standard VGA Adapter (Win7 native) is the same version ( but it has newer release date. Newest Intel driver 14.19.50 did NOT work. So get yourself the working video driver below. After Windows 7 install you will see that Standard VGA Adapter is installed and there is an exclamation mark on the "video controller". In order to install the driver we need to get exclamation mark on "video controller (vga compatible)". This spot is occupied by Standard VGA Adapter. Even when you unistall Standard VGA Adapter and install new driver after the reboot Standard VGA Adapter comes back. We need to disrupt Standard VGA Adapter from being installed. My way of disabling the adapter is to edit the driver file for it "c:\windows\system32\drivers\vgapnp.sys". There might be another way for letting Windows stop installing Standard VGA Adapter but I did not find it.

Intel(R) Graphics Controller (Windows)

Download 1
Download 2



Make sure you unistall video drivers that do not work. If you see exclamation marks on your previous drivers in Device Manager, unistall them. Your Device Manager should say that you have Standard VGA Driver installed under Display category and exclamation mark on "video controller". Make sure you restart PC when asked.


We will need to edit "c:\windows\system32\drivers\vgapnp.sys" file now, but there is a problem. Windows Vista and Windows 7 will NOT allow you to edit system files even when you are the admin. Changing security attributes of that file did not work either. The file is owned by "TrustedInstaller" service. We will need to own the file and give ourselves the full control to edit it.
Click 'Start' and in 'Search' type 'cmd'. The result will show on top. Right-click on 'cmd' and choose "Run as Administrator". If your account does not have admin rights you might be prompted to enter username and password. I used account that already has administrator priviledges. You should have a command prompt with administrator priviledges.


Lets say my logged in username is peter

First command you do is:

takeown /f c:\windows\system32\drivers\vgapnp.sys

This will give ownship to the current user. You should see a message saying SUCCESS etc..

Second command you do is:

cacls c:\windows\system32\drivers\vgapnp.sys /G peter:F

There will be a confirmation message so type 'y'. This will change the security attributes to give you ONLY all the permissions for the file. If you are paranoid as me and want original permissions restored, I will show you how to restore the permissions to the previous step later on in this tutorial :). If 'cacls' command does not work you can try using 'icacls'.


Open c:\windows\system32\drivers\vgapnp.sys in any text editor. Just add any character to the begining of the text. Let's say we will add character x . So the text should start with xMZ and the rest of stuff. Save the file. This edit will render that file unusable.


In Device Manager uninstall Standard VGA Adapter. It will prompt you to restart so do it. After install you will see a message saying that certain devices did NOT installed successfuly, which is GOOD :). Go to Device Manager and you should see the exclamation point next to "video controller" and "video controller (vga compatible)". Right-click on "video controller (vga compatible)" and do update driver. Choose "Browse for the Driver" (or something like it :) ). Point to the driver directory that you downloaded and extracted (win2000). Click "OK". Wait for the driver to be installed. It might hang for a little (It will say that window is "not responding"). Do not worry as this is still installing the driver. It will prompt you to restart so do it. (If it does not prompt click anywhere and wait for message). After restart it will finish installing the driver.

Congratulations!!! You should have a working video driver!!! :)


Open c:\windows\system32\drivers\vgapnp.sys in any text editor. Remove the first character you put there which was x. Save the file. Your file will be usuable again :). You can stop here if you want, but if you want to restore the permissions for the file to original state go to next step.


Right-click on any other file in the c:\windows\system32\drivers. Choose "Properties". Go to "Security" tab. Now compare that security tab with the security tab of c:\windows\system32\drivers\vgapnp.sys. Just make sure the security tabs of those two files look the same (all tabs and advanced options). In order to add "TrustedInstaller" it is not the same as regular usernames because it is a service.
You will need to type "NT SERVICE\TrustedInstaller" (without quotes) when adding it to own the file and to have all permissions. Once you done editing you can delete your account from c:\windows\system32\drivers\vgapnp.sys, because it was not there from the beginning. We took control over and the previous commands added it by default.

My System SpecsSystem Spec
10 Nov 2009   #43

windows 7 Ultimate 64-bit
you are a wizard

i cant thank you enough for your help, my laptop is working perfectly now!!!

My System SpecsSystem Spec

20 Jan 2010   #44

windows seven

Anyone got any information on c400 audio and network drivers issue.Drivers seem to install but won't take .
My System SpecsSystem Spec
13 Mar 2010   #45

windows 7 Ultimate 64-bit

Quote   Quote: Originally Posted by capstan View Post
Anyone got any information on c400 audio and network drivers issue.Drivers seem to install but won't take .
no problems here...

installed a network driver from Dell`s website, and the rest via Windows Update.

Even the network driver was updated btw, so it seems the latest isnt on their site either...

if you still wont get it to work let me know, and i`ll try and guide you trough it!
My System SpecsSystem Spec
19 Apr 2010   #46

dell c400

i have the same problame with the same computer
dell c400i tried to fix my problame(video card) i format my computer and lost al the drivers, when i try to change the rsulation in my computer, it w'ont work, it's stuck on 640-480. i try to do the steps that you suggts here and i didnt find the "vganpnp.sys", i only had the file "vga"
i have windows xp sp3.
someone can help me plz?

i have alot mistakes in my engilsh and i am sory
thank alot!!!
My System SpecsSystem Spec
02 May 2010   #47

Windows XP Pro SP3 (C400 / X300) Windows 7 Ultimate (Vostro)

You have XP SP3???

just download all drivers from

Best Rgds

Cristobal From Chile
My System SpecsSystem Spec

 Dell c400 Video driver issues...

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