Windows 10: Laptop downloaded win 10, installed it, but rebooted to nothing(blank)

This has now happened twice.
Lenovo E455 laptop with windows 7.
TIA

ps, after cold reboot get this error message:
Window 10 couldn't be installed
Failed 1 update
Error(s) found
C1900101-20017 Windows update encountered an unknown error

:)

 

cannot boot. please help.

I have hp laptop which had win 7 pre installed. Now I have upgraded to win 10. Recently I installed the 3rd cumulative update for win 10. After downloading, I restarted my lappy. I had my phone connected to the usb. After rebooting , I saw a blank screen
with a cursor. I checked dozens of forums but all in vain. All I know that its some bios error and my bios is unable to find window in hard drive. Please help.

 

Win 10 upgrade

I installed the win 10 upgrade on my win 7 laptop. After about 6 hours during the install I had nothing but blank back lit kind of looking screen.. After much agitation etc, I powered it down and left it for the night. (Time out, so to speak). The next
morning , I booted up and win 10 worked splendidly. Now, two weeks later, when a game I installed didn't work right I "restarted" and now I' m back to the blank backlit screen doing nothing !! What should I do ???????.?

 

If this was an upgrade from previous Windows version, maybe you have to do some things before trying again. Disable permanently your antivirus (not until next restart) or even uninstall it. Also uninstall any firewall, antispyware and other protection you may have installed, so it doesn't interrupt the upgrade process. Uninstall or disable any customization (Classic Shell, Windows Blinds etc). Disable any hard disk backup or cloning tools (Acronis etc). Disable any other application you think might cause problems. Press Win+R and type msconfig to launch System Properties. From Services tab, check the box to hide all Microsoft services and then disable most non-important services (updaters etc). Then click on the Startup tab (if you just see to open task manager, click to open that) and disable any non-important startup application (Skype, QTtask, Java updater etc). Try the upgrade again. Once successful you can enable everything back and install any uninstalled application.

 

According to this link

Microsoft Windows 10 Hints and Tips on ThinkPad and Lenovo LaVie Computers - Lenovo Support (US)

Scroll to item 19. The solution is to update your BIOS.