Coprocessor error code 28

[Bill23Smith]

After installing the new drivers from Nvidia (195.62, 197.16 and then 258.19) I still have the drivers for this device and are not installed (code 28) error. I have tried to uninstall the driver and re-boot the machine and windows finds the hardware and I get the same error.

When I updated the driver, I download the driver file, go into the extracted directory and run the setup.exe file. Then I go to the device manager and update the driver for this device and specify the directory for it to search on my hard drive.

I have a GeForce 8400M GS video card and am running Windows 7 Ultimate 64-bit. My laptop is an HP dv9500z (Product GP347AV). I am running an AMD Turion 64 X2 2.2 GHz processor.

Can anyone help?

 

[theog]

Have a look here:
http://www.sevenforums.com/graphic-cards/602-latest-nvidia-forceware-video-drivers-windows-7-a.html

 

[Bill23Smith]

I downloaded the most up to date driver (257.21 64-bit) and uninstalled the coprocessor device in the device manager. When I re-booted my machine after driver installation, Windows saw the new hardware and tried to install a driver for it. But, I am still getting the Windows error "Windows cannot find the device software for your device". When I pick from a list and select the NVIDIA GeForce 8400M GS dated 6/17/2010, Windows finds the driver but says "the driver selected does not support this version of windows". And I know I downloaded the 64-bit Windows 7 version of this because there is a sub-directory under 257.21 called WinVista_Win7_64.

 

[Bill23Smith]

I solved my own problem by installing a newer version of the AMD chipset drivers from HP (sp37730) and rebooted.

 

[zedric]

coprocessor error code 28

hello,can anyone help me with my problem,im running a vista ultimate to my laptop then i upgraded into win7 ultimate.after the installation complete,everything seems to be fine but then when i use the camera it shows nothing but a black screen so i checked my drivers to a device manager and it appears that my coprocessor didn't work,it say's that the drivers for this device are not installed.(code 28).i have an acer asphire 5520 running 32bit AMD turion 64 x2TL-58(1.9GHz, 2 x 512kb L2) NVIDIA GeForce 7000M,i tried to install the latest driver and the 15.49 nforce as well,but still didnt work.any suggestion would be appreciated,thanks in advance