missing drivers for SM Bus Contoller, PCI Device and unknown Device on E5 511

soodrkp
soodrkp Member Posts: 3 New User
edited August 2023 in 2018 Archives
Hi, I had recently changed my HDD and reinstalled win 8.1 on Acer E5 511 machine.  Window is not running properly and under "Device Manager",the following three device drivers are listed as missing :- SM Bus Controller, PCI Device and Unknown Device.  Could some one help me to identify the drivers needed so that my window runs properly.

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Answers

  • JackE
    JackE ACE Posts: 45,201 Trailblazer
    If for some reason you weren't able to transfer the system from the old HDD to the new HDD, then you should be able to download all the drivers you need from here https://www.acer.com/ac/en/US/content/support-product/5394?b=1    Jack E/NJ

    Jack E/NJ

  • soodrkp
    soodrkp Member Posts: 3 New User
    Dear JackE.  Thanks for time taken to reply to my query.  I am aware of the link quoted by you but is not sure which driver to download and install for SM Bus Controller, PCI Device and Unknown Device quoted in the Device Manager.  Shall be grateful if you could kindly mention each specific drivers needed by me.
  • Tmzdroid
    Tmzdroid Member Posts: 88 Fixer WiFi Icon
    Answer ✓
    You could try this 3rd party program 
    https://www.iobit.com/en/driver-booster.php
  • JackE
    JackE ACE Posts: 45,201 Trailblazer
    @soodrkp >>>>I had recently changed my HDD and reinstalled win 8.1 on Acer E5 511 machine.  >>>

    Did the old HDD fail? If not, the easiest method might be to simply clone the old drive on the new drive. Jack E/NJ

    Jack E/NJ

  • soodrkp
    soodrkp Member Posts: 3 New User
    @Tmzdroid.  Your suggestion did the trick and now device manager does not list any missing driver. Thanks buddy for offering possibly  a best solution to my problem of missing drivers.