HP EliteDesk 705 G1 Desktop Mini Maintenance And Service Manual page 209

Computer will not continue after HP logo screen displays.
Cause
"Illegal Operation has Occurred" error message is displayed.
Cause
Software being used is not Microsoft-certified for your version of
Windows.
Configuration files are corrupt.
Solution
Windows from starting correctly. Windows Startup Repair is one
of the recovery tools in the System Recovery Options menu. You
can also create a system repair disc that contains the System
Recovery Options menu. If the problem is severe enough that
Startup Repair doesn't start on its own and you can't access the
System Recovery Options menu on your computer's hard disk,
you can get to the menu and start Startup Repair by using the
Windows installation disc or a system repair disc that you created
earlier.
In Windows 8.1, use Automatic Repair to fix problems that might
prevent Windows from starting correctly.
To access Automatic Repair:
1. Press the Windows logo +
2. Select Change PC Settings, select General, and then under
Advanced startup, click Restart now.
3. Select Troubleshoot, select Advanced options, and then
select Automatic Repair.
Windows starts Automatic Repair.
4. Select the account to use to begin Automatic Repair, and
type the password for the account.
Windows diagnoses the computer and attempts the repair
it.
Solution
Verify that the software is certified by Microsoft for your version
of Windows (see program packaging for this information).
If possible, save all data, close all programs, and restart the
computer.
Solving software problems 199
l to open the Settings charm.