My older PC has been freezing and sometimes won't let me sign in. It's running Windows 11, or at least I'm fairly sure it is, and I've already tried resetting it twice without fixing the problem. A friend suggested opening the case and cleaning dust from the components and fans. It seemed to run better afterward, so I started installing updates. During the update, the screen suddenly filled with flashing pink and white pixels, then the computer shut down and restarted. Booting took longer than usual, but it appeared normal afterward. The update seems to have finished, although it then sat on the welcome loading screen for several minutes. Could the cleaning have caused this, or is it more likely a graphics, cable, driver, memory, or storage problem?
3 Answers
A clean installation can be useful as a troubleshooting baseline, but a normal factory reset and a completely fresh installation aren’t always the same thing. Since the computer is already unstable, back up anything important first. If the glitches continue after checking the hardware and reinstalling the graphics driver, test the system with a fresh installation and see whether the problem returns.
Pink and white artifacts can happen when a graphics driver is being updated, but they can also indicate a failing GPU or a connection problem. Since the case was opened, check that the graphics card is firmly seated, its power connector is attached, and its fan is spinning. Also reseat the memory modules and make sure every fan and internal cable is connected. Before assuming the hardware is dead, try another HDMI or DisplayPort cable if possible.
Don’t rule out the memory or storage, especially if this machine has an older hard drive. Run a full memory test from a bootable USB drive, and check the drive’s health if you can. A bad video cable, a driver update, overheating, failing graphics hardware, or damaged memory could all produce strange screen behavior and reboots, so the results of those tests should help narrow it down.
I thought the factory reset was basically the same as wiping everything and starting over. Is there an important difference between that and a clean installation?