For those who experience the BSOD due to Microsoft expansion utility or for any reason (expand.exe) please follow this guide in an attempt to eliminate such failures. Note1: Please download and run Who Crashed to help pinpoint which .sys file is causing the error Note2: This process does not only apply to the two files listed, but any other file extension types such as atikgktxx.dll and atikeclxx.exe just repeat the steps below. Steps: 1. Ensure you have the latest and greatest GPU drivers installed... (control panel>system and security>device manager>display adapters>properties (under respective card)>driver date. If you have the latest continue with step 2. 2. C:\AMD\Support\12-4_vista_win7_64_dd_ccc\Packages\Drivers\Display\W**A_INF\B****** 3. Copy the file atikmdag.sy_ "OR" atikmpag.sy_ 4. Create a folder called "TEST" and place it either on your desktop or C: drive, paste copied file into this folder. 5. Open the "COMMAND PROMT" "CMD" 5. enter the following command: EXPAND.exe atikm(p/d)ag.sy_ atikm(p/d)ag.sys (make sure there is a space between the file types when you are typing or it will not expand)Example: EXPAND.exe atikmpag.sy_ (SPACE) atikmpag.sys 6. Once done open C:\Windows\system32\drivers and rename the existing atikmdag.sys or atikmpag.sys to atikmdag.sys.bak or atikmpag.sys.bak 7. Copy the newly created atikmpag.sys or atikmdag.sys file from the "TEST" folder you made earlier into the file path in step 6. 8. Reboot and your done (all BSOD related to those two files should no longer happen) Reasons for this issue can be due to incorrect expanding and extracting .sys files for multiple reasons.