Network adapter missing

By dknight06 ยท 7 replies
Feb 24, 2012
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  1. Good afternoon and thanks in advance.

    Last week during a weird power surge in my house, my PC started having difficulties, and eventually with no warning the BIOS apparently reset itself to factory defaults. So for about a week I was working through figuring out a 'Operating system is missing error'.

    However, after finally getting my BIOS set back up and realizing it switched me back to IDE from RAID, I got the machine working and everything seemed to be ok, except now I cannot connect to the internet.

    When I go into device manager, the only two Network adapters listed are the ones that were created when i installed vmware software last year. Prior to the BIOS issue, I had no issues what so ever connecting to my home network and even trying to install Legacy devices doesn't bring up the Realtek network adapter the MoBo came with. Any suggestions?

    Long story short: After my computer being out of comission for a week, after getting it back on, my network adapter is missing and I cannot connect to the internet.

  2. wrt54gs7

    wrt54gs7 TS Enthusiast

    Try restoring default bios settings then reconfigure your raid. Or disable the net adapter at the bios then boot windows, then reenable it at bios, again check device manager.
  3. dknight06

    dknight06 TS Rookie Topic Starter

    Thank you, I will try that. Unfortunately, it looks like something else may be the issue as the BIOS keeps resetting itself all by itself.
  4. wrt54gs7

    wrt54gs7 TS Enthusiast

    Try replacing your CMOS battery.
  5. dknight06

    dknight06 TS Rookie Topic Starter

    Hmmm...sounds like the easiest solution to try at this point. Thanks, I will.
  6. coolermaster

    coolermaster TS Rookie Posts: 17

    I've never seen a failing/failed CMOS battery cause a network card to disappear.

    My guess would be the power surge also blew a circuit on your network card.

    If this is a desktop - try a new PCI card or if its a laptop try a PCMCIA / PC card net adaptor.
  7. wrt54gs7

    wrt54gs7 TS Enthusiast

    CMOS battery maybe the cause of BIOS resetting it self not disappearing network adapter.
  8. dknight06

    dknight06 TS Rookie Topic Starter

    Correct, I've got to get my BIOS stable prior to fixing the network adapter. Thanks again for the help, just waiting on the CMOS battery to get to my house.

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