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Sounds like a DNS problem. Firefox is the only browser that uses DNS over HTTPS so if you were having issues with the DNS server in your Wired Connection properties, Firefox would still work since it communicates with Cloudflare DNS over HTTPS instead. This would also explain why switching networks fixed the issue.
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Yes! This is exactly the problem!
Do you know how to fix this issue?
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Tried them all, for a brief moment it seemed to work, but then Wi-Fi became disconnected again (also non-reproducible) 
Resetting the modem also helped, but also only for like half an hour.
It seems something is messing up my Wi-Fi settings periodically.
I'm not on wired internet, which works.
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Ok WiFi is trickier to figure out for sure.
Are other devices able to connect to the access point while your laptop will not connect? If not the router may be overheating, which would be why unplugging and replugging in the router fixes the issue. You can figure out a way to cool it such as a fan or something, or just replace it. Some older Linksys routers made in the early 2010s would overheat when they were brand new.
I assume you have downloaded and reinstalled the latest driver for your WiFi card from the Dell website as well?
Are you using Bluetooth on the laptop, if so try disabling the Bluetooth on the laptop. Dell has had alot of issues with their WiFi/Bluetooth cards in the past. I have personally had the Bluetooth issue on one of the Dell PCs at work.
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Chaoix wrote: If not the router may be overheating
I'm the only one without Wi-Fi at the office.
Another coworker had the same issue, also a Dell, but she doesn't have Wi-Fi at home either whereas I have Wi-Fi everywhere except at the office.
Overheating was actually a problem that made the Wi-Fi disconnect, which made the alarm go off at 1AM, four nights in a row (we had a heat wave last week), so the building owner turned on the AC and it's been on day and night since then 
So we can rule out overheating.
Chaoix wrote: I assume you have downloaded and reinstalled the latest driver for your WiFi card from the Dell website as well?
You may be on to something there 
I used to have this Dell tool that kept bugging me about updates and such (and so I was always up-to-date), but it seems I never reinstalled it after I formatted my computer last year.
Got it again after reading your reply and there were updates for te BIOS, chipset, network and Bluetooth devices.
Hopefully this will solve the issue!
I'll let you know if it solved the issue on Monday.
Thanks for the help 
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Updating all Dell drivers did not make a difference.
Wi-Fi is still out (also reset network configuration and restarted) 
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Have you tried "forgetting" your Office's wifi network on the laptop and re-adding the wifi? Maybe the wifi network profile on the laptop has a mismatched channel or something.
Has someone looked at the router since it overheated 4 days in a row? Maybe something got corrupted in its configuration from overheating. If the wifi on your laptop still works fine at home, I would still lead you towards looking at the router's configuration or the office network. It possible advanced settings such as the MTU can prevent connectivity, but all of those settings were more than likely set to default from all of the troubleshooting you have done at this point.
Your laptop doesn't have a IP conflict with another device on the network does it? Maybe your work uses DHCP reservations and they got messed up?
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Chaoix wrote: Have you tried "forgetting" your Office's wifi network on the laptop and re-adding the wifi?
Yeah, no results.
As for all the rest you're saying, I'm renting a work place and other people and companies also use the network facilities here.
I can't fiddle with the router or all of them would be without internet (did that once to reset it).
There's no network, it's just a couple of computers connecting to the internet, no central servers or anything, at least not for me (I don't know what the other companies here are doing).
I wouldn't know what IP I'd have to conflict with as I can't see or reach any of them.
It's kind of like connecting to the Wi-Fi at McDonalds or Starbucks, except that it doesn't work.
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I am being forced to use TFS at work having spent the last few months learning GitHub - why does VS 2019 default to using Github every time you launch it ? I set TFS as the default in settings but it doesn't stick
"We can't stop here - this is bat country" - Hunter S Thompson - RIP
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512/1049[^]And I'm not getting the CP Newsletter again. Probably a page border right?
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My VS defaults to the last used source control system. At work we use Git for our main code base but also have legacy code in TFSVC.
/ravi
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Microsoft recognise a quality product. 
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Indeed,
Richard MacCutchan wrote: Microsoft recognise a quality product.
A $7.5 billion dollar recognition of a quality product.
Best Wishes,
-David Delaune
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Try closing VS, delete the .user file, and re-open VS. Your user settings file may be corrupt.
"There are two ways of constructing a software design: One way is to make it so simple that there are obviously no deficiencies, and the other way is to make it so complicated that there are no obvious deficiencies. The first method is far more difficult." - C.A.R. Hoare
Home | LinkedIn | Google+ | Twitter
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...but not worry, I'll just have to work harder and get them all back.
But what I did to warrant a 2,500,000+ points deduction I'm not quite sure.
Still, from zero rep points, the only way to go is up! 
"I have no idea what I did, but I'm taking full credit for it." - ThisOldTony
"Common sense is so rare these days, it should be classified as a super power" - Random T-shirt
AntiTwitter: @DalekDave is now a follower!
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Somehow I read whatever you said as "you donated them all... but fate might bring them back to you with interest in due time."
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They're doing a stock split: OG, OG1, OG2, etc.
To keep things more competitive.
It was only in wine that he laid down no limit for himself, but he did not allow himself to be confused by it.
― Confucian Analects: Rules of Confucius about his food
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I dropped to '6' last night, so now I can say that at my lowest I has higher than you! What an accomplishment! I'll put it on my headstone! (They did come back...)
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New CP scam you need to know about after users lose thousands of rep - Liverpool Echo[^]
Obviously not a real link 
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Haha 
Sucked me in with your click bait.
I clicked twice.
Should have a counter on it.
"Rock journalism is people who can't write interviewing people who can't talk for people who can't read." Frank Zappa 1980
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Some kind of number overflow?
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The rep counters are 4-digit, base 40 counters. Your rep points rolled over at 404, or 2,560,000.
Freedom is the freedom to say that two plus two make four. If that is granted, all else follows.
-- 6079 Smith W.
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