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I've tried to Install an Intel network driver for my laptop. It's Intel 825xx 10/100/1000 Ethernet Controller Driver Version: 18.1.0.0 ,A08 (I got it from the Dell Support Website which told me this was one of the drivers fitting my device).
According to the log, it fails with:
Installation was not successful. The most likely cause is no supported network connection exists on this platform.
What's that supposed to mean? Do I need to plug a LAN cable into the LAN adapter, so that a network connection can be established before the driver will install properly? Or is the LAN network device out of order? Or something else?
I've tried that on Win7 and (following automatic upgrade) Win10 - same error all the time.
I further tried installing with 'Intel Device Manager Diagnostics Utility' available from the same website. It said it installed nothing since no network connections existed and no Intel adapters were found.
Edit: Additional info as requested by first three comments:
THose are the drivers I found:
Chipsatz-Treiber :http://wikidrivers.com/wiki/Intel_Chipset_Device
Kartenleser :http://www.dell.com/support/drivers/us/en/555/DriverDetails/Product/latitude-e6420?driverId=KC9W0&fileid=2731102815
Broadcom USH :http://www.dell.com/support/drivers/us/en/19/DriverDetails?driverId=R308326
Had the same issue on my Latitude E6430. Turns out, that the network card was disabled in the BIOS. Obviously, the operating system had no chance of detecting the Intel(R) 82579LM Gigabit Network
adapter.
Once, I turned in on there, Windows automatically installed the required drivers.