About 10% of hotfix payload records are indicating failure due to AccessingLogFailed. The problem is most pronounced on Windows XP. Georg: would you mind brain dumping?
Most of these were actually "install.log not found or not updated", right? https://hg.mozilla.org/releases/firefox-hotfixes/file/d29a3d24405c/v20140527.01/InstallerLauncher/InstallerLauncher/InstallerLauncher.cpp#l392 On Windows 5.1.* / XP, we don’t try to elevate.  If we detect that the install path is not writable, we run the installer non-hidden , the assumption being that users can try to install to a writable location. However, i assume we still default to the non-writable location in that visible installer as i don’t see us changing/influencing the path anywhere. How likely does that scenario seem? Are we somehow able to confirm/correlate this from the data we have?
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