Hi @AxD, I found that the privateregistry.bin is not used to save vs configuration. Before running VS, the .bin file will retrieve information from ApplicationPrivateSettings.xml next to privateregistry.bin. 
And you just need to delete paths in the value section of CodeContainers.Offline collection, then restart visual studio.
Hi @YutaMasuyama-6901 , to confirm it, we suggest you access Volume Licensing Service Center: https://www.microsoft.com/Licensing/servicecenter/default.aspx
Hi @YutaMasuyama-6901, we don't have sufficient authority to provide answer for this. You can follow this list: https://docs.microsoft.com/en-us/licensing/contact-us to get the answer from VLSC.
Hi @YannDuran-5311 , my visual studio is 16.9.4, and it could work. I can't upload it as attachment which doesn't support the zip file.
By the way, I found another way to get the MRU list, maybe it can help you: https://github.com/GrzegorzKozub/ClearRecent/blob/f8297376ca999fd3ef4c89fd5d2b0d6645d22b74/src/ClearRecent/Services/FileMenuRecents.cs#L51
Hi @empleat-6716, sorry for the delay. The code was not pasted because it won't be displayed here. And I have tried but can't find related extensions in extension marketplace. If this workaround can not help you, we suggest you provide a suggestion here: https://developercommunity.visualstudio.com/report?space=8&q=autocomplete+std%3A%3A&entry=suggestion
Hi @HieuHO-0395 , it seems that there is something wrong with visual studio installation. You can try to re-install visual studio. If it doesn't work, I'm afraid that you need to re-install your system.
Hi @YutaMasuyama-6901 , maybe you can use command tool : devenv.exe. The Devenv switch syntax: https://docs.microsoft.com/en-us/visualstudio/ide/reference/devenv-command-line-switches?view=vs-2019
Hi @LingSteven , 1. yes, the pdb will be generated in output directory, instead of AppX folder. 2. The .vs folder is used to save related configuration of visual studio in your current project. Deleting it is just to reset "current environment.
Hi @AnthonyBruce-1303 , since tracker.exe is from windows sdk, maybe you can try to install latest windows sdk through vs installer and update the version in your project properties page.
If it doesn't work, we suggest you report it to developer community: https://developercommunity.visualstudio.com/report?space=8&entry=problem
Hi @EricShen-4295 , thanks for feedback. We suggest you report it as a problem in developer community: https://developercommunity.visualstudio.com/report?space=8&entry=problem
Hi @ribkix-2977 , you can try to open C:\Program Files (x86)\Microsoft Visual Studio\Installer\vs_installershell.exe, if the report problem page still doesn't work, please go to C:\ProgramData\Microsoft\VisualStudio\Packages, and confirm if the _Instances folder exists, if not, I'm afraid that you need to re-install visual studio.
Hi @ribkix-2977 , could you follow below steps to help us collect some logs about vs on your environment?
1. Download and run this collect.exe tool
2. Go to %temp% folder and find the vslogs.zip file
3. Upload it to https://onedrive.live.com/ and share the link here
Hi @Cataster-7485, we suggest you continue to follow up previous thread on stack overflow, and then you can ask more details which could make it work in your project.