Hi Richard,
Sorry for the inconvenience caused and delay in response.
I suggest you to try the below step and check if this helps.
Step 1:
To diagnose whether this issue occurs in “Safe Mode”, let’s reboot the computer in safe mode with networking and check if the issue appears there as well.
Safe mode is a diagnostic mode for Windows that starts your computer in a limited state. Only the basic files and drivers necessary to run Windows are started. This helps us in identifying whether the issue is due to some third
party programs conflict. The word Safe mode appear in the concern of your monitor to identify which windows mode you are using.
Follow the steps given below and check if that helps.
1.
Unplug external devices connected to the computer expect
keyboard and mouse.
2.
From login screen, press Shift key and click on the
Power button and click restart to enter Advanced Boot Options.
3.
In this page select troubleshoot
option.
4.
And click on Advance option.
5.
Select Startup setting from advance option.
6.
Here you will find Restart button, just click on it.
7.
In new windows press F5 to login with
safe mode with networking.
If the issue does not exist, try to clean boot the system.
Step 2: Perform Clean Boot.
Placing your system in Clean Boot state helps in identifying if any third party applications or startup items are causing the issue. Check this issue in clean boot state.
- Press Windows key + X key. And select
Run.
- Type msconfig in the Run box and hit Enter.
- On the Services tab of the System Configuration dialog box, tap or click to select the
Hide all Microsoft services check box, and then tap or click
Disable all.
- On the Startup tab of the System Configuration dialog box, tap or click
Open Task Manager.
- On the Startup tab in Task Manager, for each startup item, select the item and then click
Disable.
- Close Task Manager.
- On the Startup tab of the System Configuration dialog box, tap or click
OK, and then restart the computer.
For more information refer the below link.
How to perform a clean boot in Windows
http://support.microsoft.com/kb/929135
Note: After troubleshooting, refer to this section "How to reset the computer to start normally after clean boot troubleshooting".
Hope this helps.
Kindly get back to us with the status of the issue to assist you further.