Windows 10: Older Lenovo T420 laptop will not boot to Windows

Discus and support Older Lenovo T420 laptop will not boot to Windows in Windows 10 Support to solve the problem; I am trying to help out my brother with his old Lenovo T420 laptop. It came with Win7. I upgraded to Win10 back when free upgrades were offered. All... Discussion in 'Windows 10 Support' started by SJMaye, Apr 14, 2019.

  1. SJMAYE
    SJMaye Win User

    Older Lenovo T420 laptop will not boot to Windows


    I am trying to help out my brother with his old Lenovo T420 laptop. It came with Win7. I upgraded to Win10 back when free upgrades were offered. All went well. Now several years later he asked me to have a look at it because it will not boot to Windows.

    I tried to repair. I tried to go back in time to a system restore point long ago. Still would not work. It would not even allow me to boot in Safe Mode. I am able to get a command prompt. I am little confused as the drive letter is X: . Please don't laugh. I just have not seen this before.

    I could do a fresh install, no problem. Problem is I don't have a WIndows 10 key from the upgrade. If it was even a possibility I can no longer read the Windows 7 key on the bottom of the laptop either.

    So I am afraid to wipe it and start over for fear of not being able to activate. Can someone offer some advice? Is

    :)
     
    SJMaye, Apr 14, 2019
    #1
  2. HAWKEYEMT
    HawkeyeMT Win User

    Windows 10 Trying to Install to Incompatible Lenovo T420

    I have a Lenovo T420 with an Intel Core i5-2520M. Lenovo website says this machine cannot run Windows 10 due to incompatible Intel HD Graphics 3000 embedded in the 2520M processor. However, Windows 10 detects the T420 as compatible and keeps trying to install.
    I would like to have Windows 10 and tried the install, but video was erratic, screen goes black & have to reboot to get video back, only to occur again a few minutes later. Lenovo says no fix forthcoming. How do I stop Windows 10 from trying to install on incompatible
    T420 laptop (or better yet, get it to run properly)?
     
    HawkeyeMT, Apr 14, 2019
    #2
  3. EDTITTEL
    EdTittel Win User
    Lenovo Thinkpad T420 clean install after upgrade.


    One more thing to consider: Lenovo does a good job of supporting its PCs through its support pages. They have a utility called System Update 5 that you can grab from the support pages for your T420 model. Once installed, it will tell you if Lenovo thinks you need any drivers. They don't always move as quickly to recognize updates as they could, but they do a pretty good job of lagging somewhat behind the leading edge...
    HTH,
    --Ed--

    PS: here's what the utility looks like (I have a T520 and an X220 Tablet, both Lenovo laptops):

    Older Lenovo T420 laptop will not boot to Windows [​IMG]
     
    EdTittel, Apr 14, 2019
    #3
  4. JOEBLACKWELL
    JoeBlackwell Win User

    Older Lenovo T420 laptop will not boot to Windows

    Lenovo T420 fn keys not working

    Help!

    I need Bluetooth on a Lenovo T420, Fn + F5 not working, anybody know how to fix this problem?
     
    JoeBlackwell, Apr 14, 2019
    #4
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Older Lenovo T420 laptop will not boot to Windows

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