Probably you are missing some of the Google services related domains in your whitelist and that causing the issue.

I presume you have removed the transparent folio from the top of the router. Place the device in a well ventilated place, not under shelfs or so. You can place the router in vertical position,...

You are not the only one, if you browse the forum you'll see a lot of similar cases, but this can be due to a lot of different reasons. As you wrote it has been working without issues for the past...

@ArkadiuszN Probably not. If you go to FW page for your device, at the end of the release notes, there should be a note stating that downgrade is not possible. Can you browse the device logs just...

So, if you reboot the router and the laptop wireless adapter, it can connect successfully ? What is the laptop wi-fi card model ? I see that you have the initial version of the VR600 FW. Try to...

Only HP laptops have this issue, other devices like phones, tablets, etc. are fine ? What are you wireless settings in the VR600 ? - channel width, channel number, security, encryption type, etc. -...