How do I get Visual Studio 2019 Community back to my Azure DevOps projects
Solution 1:
For any poor soul that gets into this state, I figured I'd post what finally worked:
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Log out of VS
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Log out of all Microsoft accounts in all browsers and delete all MS related cookies...including Internet Explorer (which you might have never ever used).
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Make sure you have TLS 1.2 explicitly enabled:
HKLM\SYSTEM\CurrentControlSet\Control\SecurityProviders\SCHANNEL\Protocols\TLS 1.2\Client Enabled = 1
(based on a closed VS Community reported problem that said TLS 1.0...but it was 2 yrs old)
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Start VS - log in
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Connect to Team project (in team explorer's manage connection window)
There was an additional hardware/firmware-related error. Turns out, in this and similar models, there's a bug somewhere related to the battery power sensor that causes firmware to put your CPU in a low-power state, even when plugged in. You have to disconnect the battery for a minute or two, and the low power state clears up. This propagates to peripherals...and network operations time out frequently. It may have been the root cause.