Hi ! I'm a developer and i installed Visual Studio 2026 Insider, containing Microsoft Visual C++ Redist 14.50, however, installing VS2026 with some workloads that update MSVC or just installing this MSVC permanently break Vegas, like, will never start again, and any versions of Vegas (so, including 23, 22, etc), and uninstalling Visual Studio, the specific workload, or even the MSVC version directly don't fix the issue, and restoring the files don't work at all, unfortunately, this version of VC++ will soon be used on other MS products or other software, if they do that, it will break any version of Vegas permanently, and downgrading MSVC doesn't work, maybe a specific file is edited, or maybe this version is corrupted, or maybe it's because of registry keys or other stuff, i will contact Microsoft as well to fix this issue, if the Vegas team see this, can you please check on a VM please (don't test this on your PC except if you have a restore point) ?

You can't fix this for now, i'm working on a tool that completely revert MSVC v145's installer's stuff so i can use Vegas again, for now, i can't use it at all, i start Vegas, and it crash directly after finishing loading, and i don't have a restore point to revert this, so, don't install VS2026 with a workload that add MSVC (.NET Desktop workload work fine) and use VS2022 instead for now, or don't install latest MSVC, remember that only a restore point made prior MSVC's installation can fix this, if you already have this issue, you can contact me (at least a day or two after i published this post), idk if i can publish my mail here, so if needed, ask here, and if you want, you can try in a VM and send the errors to Microsoft so they can fix their MSVC .