Windows 7 missing network adapters

I have a Windows 7 laptop which according to device manager has no network adapters, either wired or wireless.
I have used a command prompt to enable me to view non-present devices and both show up.
I have booted from a linux CD and both wired and wireless work fine so it is not a hardware issue, it is a problem with Windows.

There are no options in the bios to turn network adapters on or off but they must be enabled since they both work in Linux.

Any ideas?
viper550Asked:
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AdrienneSperberTech Support CoordinatorCommented:
Download the drivers for them from your PC manufacturers website, for your specific model as well.
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Pradeep DubeyConsultantCommented:
open device manager and click on View select option hidden devices, now check if you get the network adapter.

Also make sure you have installed all drivers from motherboard CD/DVD.
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viper550Author Commented:
I cant install drivers for devices that are shown as not present
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viper550Author Commented:
devices do not show up under hidden devices but they are listed under non-present devices
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Manjunath SulladTechnical ConsultantCommented:
Go to device manage, and right click on computer icon, and select "Scan for hardware changes"  It should detect..

Once its detected, Reinstall the drivers..

If its not detecting, Try to add legacy network adapter and browse for driver selection and click on have disk and browse for correct driver file  and install and test.
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viper550Author Commented:
devices not found with a scan for hardware changes, adding legacy hardware makes no difference
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Thomas GrassiSystems AdministratorCommented:
Did this just happen?

IF so go back to a know good restore point.

Maybe something got installed that effected this configuration.

What anti virus program you run? IS it up to date? Does it scan regularly?
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viper550Author Commented:
This happened after a virus infection, laptop had mcafee installed but still got infected.
McAfee has been removed from the laptop.
The laptop hard drive was removed and an external virus scan carried out on another PC to remove the initial virus.
The laptop now works fine apart from the network adapters.
I have ran Malwarebytes and Nod32 anti-virus and laptop is clean.
There are no restore points on the laptop so I cannot go back to an earlier date, it looks like the customer turned off the restore for some reason.
I can wipe and re-install the laptop which will probably restore functionality but I would prefer to find the issue for future reference.
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Thomas GrassiSystems AdministratorCommented:
Viper550

YEs that would have been my next suggestion is to do a fresh install.

Only thing if infected the hard drive may be bad to use.

Think about getting another one to replace just a thought.
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Pradeep DubeyConsultantCommented:
Can you send the screenshot of the network adapter from device manager, so that we can get more info about that.

Also if you are seeing the network adapter and any yellow mark for any unknown hardware i request you to just right click on that and uninstall it. then scan for hardware and see if its network card ( you will have to provide NIC driver)
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viper550Author Commented:
There are no devices with exclamation marks, the adapters are not present according to windows.
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Pradeep DubeyConsultantCommented:
can you boot into the safe mode with networking and check once?
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viper550Author Commented:
I have tried safe mode, safe mode with networking and clean boot, still no network adapters
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Pradeep DubeyConsultantCommented:
did not provided screenshot of the devmgmt.msc
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Thomas GrassiSystems AdministratorCommented:
I would do a fresh install at this point.
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Pradeep DubeyConsultantCommented:
Fresh installation is the last option.
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viper550Author Commented:
Screen shot attached
Devmgr.png
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viper550Author Commented:
Thanks for the suggestion but I have already installed latest drivers for chipset and updated the bios, it is a windows issue not a driver issue.
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Pradeep DubeyConsultantCommented:
okay can you run below exe and check if that is detecting the NIC card or not?

remove .zip to start with working.

also let us know if service pack 1 is installed.
freepcaudit.exe.zip
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Pradeep DubeyConsultantCommented:
Also did you installed any new application or hotfix (or windows update runs)
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Pradeep DubeyConsultantCommented:
open msinfo32 and locate component-->network-->adapter and check here if NIC is located or not along with this check for the protocol.
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viper550Author Commented:
freecpaudit will not run "invalid access to memory location" error
msinfo32 does not show network adapters
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Pradeep DubeyConsultantCommented:
freecpaudit is working on my machine (win7 32bit). Can you try to run check disk once on the machine.


if Win7SP1 is installed then i suggest uninstall it once and then try to get fix this NIC issue.

I hope this uninstallation will do this NIC working.
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nobusCommented:
to me it looks like an OS corruption
backup your data - and do a fresh install
it takes time, but will be the quickest solution in the end
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Pradeep DubeyConsultantCommented:
can you post latest update on this so that we can do more for you.
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viper550Author Commented:
Sorry for delay, ended up re-installing windows 7 in place which cured the problem, all network adapters appeared and now work correctly
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viper550Author Commented:
I've requested that this question be closed as follows:

Accepted answer: 0 points for viper550's comment #a39574695

for the following reason:

Not an ideal solution but I couldn't waste any more time on it
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nobusCommented:
i suggested just that in :  nobus   Posted on 2013-10-02 at 09:22:49ID: 39539032
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viper550Author Commented:
Nobus, you suggested backing up my data and doing a fresh install.
I did not do this.
I put a windows 7 disc in the drive and ran an upgrade setup, not the same thing.
Running an upgrade setup preserves all data and programs and is a lot quicker solution.
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nobusCommented:
fairly spoken, there are differences  - if we are in a law court
but since we are on EE - it does not matter that much

lets see what a mod says about it
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