Hello,
Thank you for posting your query on Microsoft Community.
We regret the inconvenience caused to you. We will assist you to resolve this issue.
Which is the current build of Windows 10 Technical Preview installed on your system?
This issue might be due to graphic card drivers being outdated. Let's try the below steps and check if it helps:
Step 1: I would suggest you to update your graphic card drivers and check if it helps.
You can update drivers from the Device Manager.
1. Right click on **Start button**and click on **Device manager**.
2. Select **Display adapter** and expand it.
3. Right click on the device and select **Update driver**.
Step 2: If the issue persists, uninstall and reinstall Graphic drivers.
1. Press Windows key + R key.
2. Type devmgmt.msc and press Enter.
3. In device manager go to display adapter.
4. Right click and uninstall.
After you uninstall the drives, I suggest you to reinstall the latest drivers from the manufacturing website and check.
Let us know the status of the issue. We will be happy to assist you further.
Thank you.