Why is my computer freezing

@davidriddl53188 from what you are describing it sounds like the computer is not really freezing but the video driver is hanging. The Ctrl+Alt+Del command forces it to recover.

Try this: Open the Intel Graphics Command Center. Go to System ==> Power. Turn off Panel Self Refresh (PSR). This is a known power-saving feature that causes scrolling lockups on these Dell displays

If it only freezes while you are browsing the Internet, go into your web browser settings and disable hardware acceleration.
If it continues to freeze, your video driver is corrupted. Go to Device Manager, remove your driver from the list of Display Adapters, close the window and restart the computer. Windows should find a new device and automatically re-install the display adapter using the existing driver.

You could try updating your graphics driver and checking if Windows has any pending updates. Also, see if it happens in every browser or just one. If it keeps freezing, check Task Manager to see if your CPU or RAM usage is too high. Sometimes a browser extension can cause this too.