Hello Caryl,
Thank you so much for reaching out and sharing details, I am Udit an independent advisor, and I am glad to assist you today. Based on your description, problem might be related to either software conflicts, graphics drivers, or system files.
So first check for Graphics Driver Issues. Go to Device Manager (you can search for it in the Start menu).
Find your NVIDIA GeForce RTX 3050 under Display Adapters.
Right-click it and select "Uninstall device."
Make sure to check the box to remove the driver software if prompted.
After uninstalling, restart your laptop.
Then, download the latest NVIDIA driver directly from the official NVIDIA website or use the GeForce Experience app to install a fresh copy.
Now Check for Background Application Conflicts.
Try performing a clean boot to start Windows with only essential services running.
Press Windows + R, type msconfig, and hit Enter.
Under the Services tab, check "Hide all Microsoft services," then click "Disable all."
Go to the Startup tab and open Task Manager, disable all startup items.
Restart your laptop and see if the freezing still occurs while watching videos.
If this resolves the issue, you can enable services/startup items gradually to find the culprit.
After this Run the Windows Memory Diagnostic Tool Again. Press Windows + R, type mdsched.exe, and follow the instructions to restart and check memory.
Now Update BIOS and Firmware. Visit the official Acer Nitro AN515-57 support page and check if there’s a BIOS update available.
And now Go to Settings > System > Power & Battery > Additional power settings.
Select your current power plan and click "Change plan settings" > "Change advanced power settings."
Under "Processor power management," set the minimum and maximum processor state to 100%.
Also, under PCI Express, disable "Link State Power Management."
If after these steps the problem continues, you might consider creating a fresh Windows 11 installation on a separate partition or external drive to test if the hardware itself is at fault.
Feel free to update me with how these go, and I’m here to help you through the next steps if needed.
Best regards,
Udit