this sounds like a faulty wifi adapter to me - option 3 in my previous reply.   If you google thru the reported issues with this Intel 7625 adapter:   - some AP's have issues with power save mode of this wifi adapter, in chromebook you can prevent this issue from happening by Settings - Keep wifi on during sleep. It's default ON.   - if you're in an area with overlapping network reach of AP's using same SSID, this adapter can come into a loop constantly switching between AP's. Only a hardware reboot of the adapter - by removing/inserting the card - will get your card working again. You can check if this is what happening by looking into the network events/errors in the chrome://device-log/ device log or the kernel log. I believe you can prevent this by disabling "Automatically connect to this network".    If above does not work for you, it is very likely that replacing your adapter will do the trick. ... View more

Weak wifi signal is very likely a hardware issue. Can be caused by improper assembly of the antenna cables or wifi adapter at the factory. I've read customers complaining about deterioration of wifi signal of this chromebook (reddit, amazon) after owning this laptop for a while.   If powerwash does not help, and other laptops have better wifi signal with the same router, you can try the following, if the laptop has past Dell warranty period:   1) check the internal wifi adapter connection to the motherboard. Clean connector to motherboard and antenna cables, if necessary 2) can be that the antenna cable is damaged during assembly, use the aux antenna cable and connect it to the main connection on the wifi card. Check if you get better signal, balancing will not work, but at least you have better signal 3) a third option, but less likely than previous 2 options is to replace the wifi card   Please report here what has helped you to resolve this issue. I'm curious, because I'm planning to buy this chromebook.  ... View more