Symptom(s):

• Error: "The IGFXTRAY.EXE file is linked to missing export HCCUTILS.DLL:IsDisplayValid."
• Error: "The HKCMD.EXE file is link to missing export HCCUTILS.DLL:IsDisplayValid."

Cause:

These errors can appear when starting Windows* after you revert to a previous version of the graphics drivers. For instance, this can happen when going from a 6.x driver to a 5.x graphics driver.

Solution:

1. Select and copy the text between the rows of asterisks below:
   ****************************************
   [Version]
   signature="$CHICAGO$"

   [DefaultInstall]
   DelReg = Intel.DelReg

   [Intel.DelReg]
   HKLM,SOFTWARE\Classes\CLSID\{280A8F40-E382-11D2-B561-00A0C92E6848}\shellex\PropertyPageHandlers\igfxcfg\diagHandler,,,
   HKLM,Software\Microsoft\Windows\CurrentVersion\Run,IgfxTray,,
   HKLM,Software\Microsoft\Windows\CurrentVersion\Run,HotKeysCmds,,
   ****************************************

2. Paste the text into Notepad and save it to C:\ as "fixreg.inf". Be sure to select Save as type: All Files in the Save dialog box.

3. Navigate to C:\ in Windows* Explorer.

4. Right-click the fixreg.inf file and choose Install. No confirmation will be given.

5. Reboot the system and the errors will be gone.

Operating System:

This applies to: