Windows 10: Black screen with blinking underscore

Discus and support Black screen with blinking underscore in Windows 10 Ask Insider to solve the problem; Hi there so I bought a used PC and Optiplex 790 and i upgraded the PSU and GPU for something better, however ever since I bought the computer i had... Discussion in 'Windows 10 Ask Insider' started by /u/Roberto_5588, Jan 28, 2021.

  1. Black screen with blinking underscore


    Hi there so I bought a used PC and Optiplex 790 and i upgraded the PSU and GPU for something better, however ever since I bought the computer i had always the issue of when booting and black screen with blinking underscore. I can boot into windows os after a 3min or so, sometimes i cant but i just retry by turning off/on the pc.I tried by upgrading my HDD to an SSD but it kept happening, so i tried installing a new fresh version of windows 10 pro on my computer, but no luck, so my last resort was updating the BIOS, which I just did but it keeps happening, however after a new windows and updating the Bios, the booting has become faster with the black screen with underscore just staying les than a minute.(Note: the hdd has been formatted and the SSD has the OS install and used as main drive. I also have the BIOS boot order to boot first the SSD). It doesn't bother my and I'm starting to think is either something on BIOS or a component like the CPU,MotherBoard,Or even the Ram. Just want to know if this is normalor if theres a way to fix this, im thinking in upgradding the componets but im sort of new in building PC, btw until recently i had no other experience with PC other than a vague 7 year old memories and school PC experience, ever since i bought the computer i increase my knowledge on technology, therefore now that i stand upon this i ask for someone to help me,either to tell me if this is normal or to guide me so that i can fix it.

    submitted by /u/Roberto_5588
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    :)
     
    /u/Roberto_5588, Jan 28, 2021
    #1

  2. My screen turns black with blinking underscore

    So i was going to play some games on my gaming windows 10 pro pc and when i turned it on there was a black screen with a blinking underscore please help
     
    Bluebrainjuice, Jan 28, 2021
    #2
  3. DSplayer Win User
    Blinking underscore and black screen on boot.

    I left my laptop to update overnight then I woke up the next day and turned on my laptop then when it booted it showed a blinking underscore and a black background. Please help quick!
     
    DSplayer, Jan 28, 2021
    #3
  4. skwiot12 Win User

    Black screen with blinking underscore

    Windows 10 Black Screen Blinking Underscore

    About a week ago, I went to use my PC that was on sleep mode. When it "woke up" it showed nothing but a black screen with a blinking underscore. I tried restarting the computer, when I did, I was able to access bios, but after, it would immediately go
    back to the black screen with the underscore. I tried reinstalling windows, but that would require a reboot to start windows normally to put media creation tool in. I tried the repair windows tool, but that didn't work either. I tried a rescue .iso file,
    but now instead of a blinking underscore, I get a message that system32/hal.dll is missing or corrupt. If anyone has any advice, it would be greatly appreciated. Thanks.

    Windows 10

    core i3 sandy bridge processor

    8gb ram

    1tb hard drive

    Radeon 7770 1gb graphics

    Biostar Tz77 eX3 motherboard
     
    skwiot12, Jan 28, 2021
    #4
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Black screen with blinking underscore

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