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Unusable notebook -Shaky login screen, shaky mouse, shaky everything
My friend's Lenovo notebook is completely useless. I don't even know how to start troubleshooting it. Windows 10 boots to a login screen that jumps all over the place. The mouse cursor jumps all over the place. It takes a dozen or more attempts to enter the login password. Once logged in, everything is constantly shaking, mouse, app windows, start menu. We got a web browser launched, and at one point the font size started getting larger and larger. I was going to download and install Malwarebytes, but I can't control the system enough to just begin the process.
He said he got a notice to install an update the other day, and that this problem started after the system rebooted. He's not familiar enough with computers to recognize a genuine Microsoft update from a Lenovo update, or from some malicious kind of attack.
I can't even boot directly into safe mode in Windows 10 anymore. With UEFI BIOS shift + F8 is useless. Has anyone experienced this?
Thanks for any input on this bear.