Hi, First, have you tried Last Known Good Configuration option? Second, when you tried to use Acer recovery disc, have you configured the boot option in BIOS? You should select CD-ROM as the first boot option in this boot sequence. And then, follow the instructions to finish recovery. If this process failed, it may be related to the recovery disc, it is recommended to contact the Acer support for further help: Acer Support Note: Microsoft provides third-party contact information to help you find technical support. This contact information may change without notice. Microsoft does not guarantee the accuracy of this third-party contact information. Alex ZhaoPlease remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.