Windows uninstaller might still leave a broken AutoRun registry entry

[jaimergp]

But, why not use the same method as conda init --reverse? That might be more robust to upstream pattern change.
Moreover, it seems that current method will break AutoRun with value like <Conda AutoRun> & <Other App AutoRun>, by substituting it to & <Other App AutoRun>. But it is invalid to have beginning & in CMD.exe

Originally posted by @YouJiacheng in #521 (comment)

[github-actions]

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[FaustinCarter]

This actually bit me just a couple days ago! Took me ages to figure out why cmd.exe refused to start. Broke basically everything that relies on a batch script to launch (looking mostly at you, VSCode).

This is on Windows 10 LTSC. Once I deleted the offending registry key, everything was back to normal.