I have re installed window 7(64 bit ) on my dell inspiron 3521.
In device manager section "NETWORK CONTROLLER'' & ''UNIVERSAL SERIAL BUS(USB) CONTROLLER'' is shown with yellow exclamation mark(missing)
i have tried to install various drivers by downloading at dell support,but without success.
You will need to download and install the Chipset drivers before installing the Network ones. Make sure you're only installing the drivers for the devices that came with your system, but the chipset driver is the most important one to start with.
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