My laptop (windows 7) has started dropping the wifi connection. Why?

My laptop has keeps dropping its network connection for WIFI.   The hard-wired connection works fine.
What can I do to fix this please?
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Qlemo"Batchelor", Developer and EE Topic AdvisorCommented:
Did you run a WiFi scan showing the channel distribution and signal strength? There might be other access points near you since short.
digiselAuthor Commented:
No.   This has been working well and fast for the past six months.   We are very well located for the strongest signal and very high speed.   I think it is more to do with the adapter.
Qlemo"Batchelor", Developer and EE Topic AdvisorCommented:
So this is in office? Still, conditions change.
I usually try with a smartphone or other device to see how reliable the connection is.  You need to perform tests or measurements, otherwise you cannot know.
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Maybe a driver update has installed a less reliable driver. Or the antenna cables connecting to the adapter have come loose.
Joe Winograd, Fellow&MVEDeveloperCommented:
This may be a hardware problem (any adapter/card/connection can go bad), but I'd check software first. One of the common causes for this is that Windows may be shutting off power to it. Here's how to fix that:

Control Panel
Device Manager
Network adapters (expand section)
Right-click on the Wi-Fi adapter and select Properties
Power Management

You should see something like this:

Power Management Wi-Fi adapter
If the box Allow the computer to turn off this device to save power is ticked, that could be the problem. Un-tick it!

Btw, Windows updates can reset it (maybe other software, too). Unfortunately, having that box ticked is the default. In fact, when I went in to capture the screenshot for this post, it was ticked! I always un-tick that box on my network adapters — and my USB hubs, too, which have the same Power Management tab:

Power Management USB hub
But sometimes when I go back in, they've been re-ticked — and not by me! Regards, Joe

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digiselAuthor Commented:
Thank you.   This seems to have fixed my problem.
And thanks to everyone for responding.
Joe Winograd, Fellow&MVEDeveloperCommented:
You're welcome. I'm glad that seems to have fixed it for you. Regards, Joe
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