Verify on your computer BIOS, that the hardware is active. If the bios is upgraded in an update, it can sometimes turn off hardware. After that, your drivers will disappear, because windows will not be able to see the hardware, and have drivers loaded for it.
Also, look in your device drivers list and see if you have a line item for OTHER. If so, try deleting it, and reloading drivers and see if that addresses the issue.
I had some other suggestions that were lost with the issue with the forum. What you see after the 3rd time writing the post so I shortened it.
One thing they should do is look in the device manager(Windows key + X > Device Manager). Any missing drivers should show up as a yellow exclamation point. The first one to get is the driver for the adapter you will be using to connect to the internet. Assuming this is a retail PC, the drivers should be on the website of the manufacture. Go to their support site and search for the model of the computer then go to drivers/download section. They will need to download the driver from another device and transfer it to the broken computer via USB. Once the internet is restored, hopefully windows update should be able to handle everything else.
What I want to know is how/when this happened. Drivers don't disappear. They become corrupted or they can be uninstalled, both of which you need to investigate. Did the computer come this way? If not, what happened? Fixing the issue is only half the problem. The other half is figuring out why it happened so it doesn't happen again.
