E5-571-52C8 very slow after BIOS update 1.32

Wouter1973
Wouter1973 Member Posts: 5 New User

My Acer E5-571-52C8 turned very slow after a BIOS update. I updated to v1.32. It seems, like it only recognizes 1 processor instead of 4. I used to be able to chose rebooting with 2 processors instead of 1 (using msconfig, advanced options). Right now I can select only 1 processor.

Downgrading to previous BIOS versions is not possible. So what is the solution?

Answers

  • laurent_14
    laurent_14 ACE Posts: 10,322 Trailblazer

    Hello,

     

    1. Have you loaded the default settings in the bios utility?
    2. Have you reinstalled the chipset driver.
    France
  • Wouter1973
    Wouter1973 Member Posts: 5 New User
    1. Have you loaded the default settings in the bios utility?

    Yes, I did.

     

    2. Have you reinstalled the chipset driver.

    Yes.

     

    The problem stays, it seems to recognize just one processor (instead of 4).

     

  • laurent_14
    laurent_14 ACE Posts: 10,322 Trailblazer

    Hello,

     

    Could you check with HWMonitor portable version (no installation) and post here a full screen shot?

    France
  • Wouter1973
    Wouter1973 Member Posts: 5 New User

    screenshot.jpg

    Like this?

  • laurent_14
    laurent_14 ACE Posts: 10,322 Trailblazer

    Hello,

     

    Hmmm it's no good. I don't see the motherboard id and the cpu name is not full. It's the first time I see this kind of issue to be honest. The only solution is to recovery the bios by an authorized repairer or a service center. This requires special "tools".

     

    I wonder if this version is really stable: 2016/04/07 = 07/04/2016

    France
  • Wouter1973
    Wouter1973 Member Posts: 5 New User

    I managed to downgrade to BIOS version 1.31, instead of 1.32, using this method: http://community.acer.com/t5/E-and-M-Series-Laptops/Aspire-E5-571-BIOS-update-v1-31-Error/td-p/380964

     

    It still doesn't recognize all the cores though...

  • Wouter1973
    Wouter1973 Member Posts: 5 New User

    My problem is solved! In the msconfig, startup, advanced options I unchecked 'number of processors', then restarted the computer, and suddenly I checked this same box again and could chose between 1, 2, 3 or 4 processors. So after all, it had nothing to do with the BIOS.