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Lots of hits if you google this old issue. Usually you delete the file and replace it. Details in searches.
I've tried everything, but nothing works for me man. Replace the atikmpag.sys file doesn't work.
It's a notebook hp pavilion dm4 1055 br.
First, go to Windows Update and update your computer...especially the relevant 'Optional' and 'Recommended' updates. These will include the .netframeworks and C++ upgrades. This must be done before trying to install AMD graphics drivers.
Your laptop is equipped with switchable graphics. In order to update the AMD driver, the Intel graphics should be the current version. Go to this Intel link and use the Intel Driver Update Utility to find the latest graphics driver for your laptop. Download and save it to your desktop. Do not install.
Download the correct AMD drivers to your desktop > Win7 SP1 64bit Legacy Use the 15.7.1
Now delete the Intel drivers from your computer using 'uninstall a program' in the computer control panel.
Uninstall the AMD drivers from your computer using the 'uninstall a program' in the computer control panel.
NOTICE IMPORTANT AMD DRIVER UNINSTALL:******
******Computers with Intel processors select 'express' uninstall all AMD software including the install manager.
******Computers with AMD processors custom uninstall the AMD graphics driver and Catalyst Control Panel only.
Note: All anti-malware/anti-virus/anti-anything should be disabled during driver installation.
Install the Intel drivers...reboot
Install the AMD drivers...reboot
AMD Mobility Radeon™ Graphics Driver:
AMD recommends using the graphics drivers provided by your notebook's manufacturer as the manufacturer may customize the drivers to support the built-in display and the features and functions specific to the notebook.
Customized graphics drivers are available for download from most notebook manufacturer's web site.
If the current operating system is not the version originally installed on the notebook it may not meet all requirements and compatible graphics drivers may not be available. Please refer to the notebook manufacturer for supported operating systems and drivers.
AMD provides reference 'generic' drivers for AMD Mobility Radeon graphics with limited support for notebook specific features and functions. This is not intended to be used as a replacement for the notebook manufacturer's driver.