I will be glad to help you with the issue you have with the computer. I understand the frustration when things don't work the way it should.
Please follow the below steps to turn off screen saver and check if it works:
Step 1: Open Registry Editor. To do so, type Regedit in Start menu or taskbar search box and then press Enter key. Registry Editor can also be launched by typing Regedit in Run command box and pressing Enter key.
Step 2: In the Registry Editor, navigate to the following key:
HKEY_CURRENT_USER\Control Panel\Desktop
Step 3: On the right-side, look for the entry named ScreenSaveActive, double-click on it, and set the value to 1 (one) to enable screen saver and make it 0 (zero) to disable.
Note that if the ScreenSaveActive string value doesn’t exist, right-click on the empty area, click New, click String Value and name it ScreenSaveActive.
Note: This section, method, or task contains steps that tell you how to modify
the registry. However, serious problems might occur if you modify the registry incorrectly. Therefore, make sure that you follow these steps carefully. For added protection, back up the registry before you modify it. Then, you can restore the registry if a
problem occurs. For more information about how to back up and restore the registry, click the following article number to view the article in the Microsoft Knowledge Base:
