Hi, After install LibreOffice is the Restart LibreOffice yes/no button really needed? I install every second day LibreOffice master build on windows and always click no and have no issue.
The prompt is shown by Windows Installer (a Windows service), which was instructed to replace something, and could not do that for some reason. The reason usually is that the component was in use by some process. This may happen e.g. when there's LibreOffice running (including quickstarter); or another process uses LibreOffice components (that could be virtually any process that shows a File dialog, which could use LibreOffice shell extension to get extended information for files); or it could be a process using fonts that need updating; or using MSVC runtime that LO installer could try to update. The failure to update the component *might* (and often is) not dangerous - e.g. in cases when both old and new versions of the component are binary compatible. So often it's safe to just ignore the restart prompt, and continue working. But we can never be sure that it's actually safe - neither for LibreOffice itself, nor for any external process that could happen to crash when continued to use the old component, when partially updated state could break them. So no, the prompt is correct, and must stay.