Hi Deninis,
you could try to uninstall all the network drivers, then reinstall them.

Here are the steps:
Go to Device Manager again (see above steps if necessary).
Expand network adapters.
Take note of the network driver(s) listed.
Right Click and then chose ‘Uninstall’.
Turn off Your HP Probook (again make sure everything else is saved and closed).
Restart your HP ProBook 4740s laptop.

Then (or otherwise do the following first if you prefer) update your drivers as per the following:
Make sure you can connect to the internet using a cable.
Go to the Network adapters.
For each adapter, right-click and select (ie. left-click) where it says “update driver software.”
In the new window, click where it says “search automatically for updated driver software.”
This will cause it to search for updates and install them.
Finally restart your laptop again.

I find it not nice when people suggest to do a Microsoft reset, even though it shouldn’t cause data loss if the correct options are selected.
Make sure you take a backup before just in case.

I hope these extra steps work for you.

Hi Katie, sorry these first two fixes didn’t help. Can you give me some more information about your computer and describe what you actually see. This will give more clues to the nature of the problem to allow diagnosis.