Boot Camp Windows 10 Preview Control Alt Delete

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Boot Camp Windows 10 Preview Control Alt Delete

I got Windows 10 Preview running using Boot Camp on my MacBook Pro. I then connected a second display and restarted. The laptop booted into Windows, but the screen was very dark, and when I checked the display settings it showed that the second display was not detected. I unplugged the external display and restarted. Windows booted into user hibernation mode then asked to Control Alt Delete to restart or login.

I tried all combination of Control Alt Delete (including using the fn key, shift key, etc) but nothing worked. I can boot back into OS X 10.10.4 without issue, but I cannot log in when I boot into Windows 10 Preview.

MacBook Pro, OS X Yosemite (10.10.4)

Posted on Jul 17, 2015 12:53 PM

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Answer 1

Loner T

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59,536 points

Jul 17, 2015 12:56 PM in response to FormezT

1. Is it a clean install or an upgrade?

2. Are BC drivers installed?

3. Does W10 boot in safe mode?

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Answer 2

FormezT Author

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Jul 17, 2015 1:10 PM in response to Loner T

These are good questions, but I don't think I know how to answer them.

I installed W10 Preview and had it running without issue for a while before attempting to connect the external display. I can't say if the BC drivers are installed. I assume that is on the W10 side? If so, I have done nothing W10 other than install what came with it. If by safe mode you mean, it starts to boot, then tells me user is hibernating, the goes to a screen which says press Contol+Alt+Delete to restart or login, then yes.

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Answer 3

Loner T

Level 9

59,536 points

Jul 17, 2015 3:34 PM in response to FormezT

Please use System requirements to install Windows on your Mac using Boot Camp - Apple Support to find the BC Drivers package appropriate for your specific Mac year/model and download it to a USB2 (not a USB3) flash drive. Disconnect all other external peripherals except the USB2 flash drive. Boot into Safe Mode (F8/Shift+F8/Fn+Shift+F8) and try to repair the drivers. If not possible, remove the current W10 installation and re-install it and install the drivers on the USB2 before you lose control of the keyboard and mouse.

Your external monitor needs BC drivers to be recognized and work properly.

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Answer 4

FormezT Author

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Jul 17, 2015 7:22 PM in response to Loner T

Thank you I will try this. The external monitor is of a secondary concern. I'm hoping to just be able to log into W10 without having to reinstall.

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