On the Windows operating system, there's a default feature that automatically turns off the screen or puts the computer to sleep after a certain period to protect the screen in case you forget or leave your computer idle for a long time. If you want to keep your screen bright, you need to disable this feature as described in the following guide.

1. Setting up in Power Options
For Windows 7
Step 1: Navigate to the Start (1) menu => Control Panel (2).

Step 2: Choose System and Security.

Next, press Power Options.

Step 3: Select Change plan settings.

Step 4: Click on the option for Turn off the display (1) and change it to Never (2).

Similarly, perform the same steps for Put the computer to sleep (3) by selecting Never and then press Save changes (4).

For Windows 10
Step 1:

Step 2: Navigate to the System section.

Step 3: Next, go to Power & Sleep (1) => click on the option for When plugged in, turn off after (2) => Never (3).

Step 4: Move to the Sleep (1) section => change When plugged in, PC goes to sleep after to Never (2).

2. Disable Screen Saver feature
On Windows 7
Step 1: Right-click on the screen and select Personalize.

Step 2: Choose the Screen Saver option.

Step 3: Click on Screen Saver (1) => (None) (2).

Next, press Apply (3) => OK (4) to finish.

For Windows 10
Step 1: Click on Start (1) => Settings (2).

Step 2: Select Personalization.

Step 3: Choose Lock screen (1) => Screen saver settings (2).

Step 4: Click on Screen Saver (1) => (None) (2).

Then, select Apply (3) and OK (4) to finish.

With the simple steps in the article, you can help keep your computer screen bright for presentations and work. Wish you all the best!