I copied this from another board but it is the same suggestion I would give you. Try these in order.
1. Have you set any photos outside from Windows Screensaver pictures?
2. Which antivirus program is installed on the computer?
I would suggest you to perform the steps provided here. Let's analyze and identify the cause of the issue.
Here are a few steps you may try and let us know the outcome.
Make sure you have the following power settings set on your laptop.
a. In the Power options window, set "Choose when to turn off the display" to never.
b. Set "Change when the computer sleep" to Never.
Set the Screensaver timing to 2 minutes and check.
Note: This setting is just to check if the screensaver works with this setting.
Uninstall the display adapters and reinstall the latest drivers from (insert your computer model here) website.
a. Right click on Start button and select Device manager.
b. Browse Display Adapters, right click on the driver and select Uninstall.
c. Restart the computer and download the drivers from HP website.
If the issue still persists, create a new user account and check the issue using step one to see if something in your account settings is prevent it from loading.
(I would also suggest for testing to chose a basic screen saver and not something with photos or one that has been modified for testing purpose.)