How can I recover Favorites and passwords after a change of operating system and older programs are listed in a windows.old folder? I restarted the Task Scheduler service and the problem was solved. I deleted all the files in the \Windows\Prefetch folder and noticed that no files have been created it there for new programs began. Why are there not file prefetch for Thunderbird in the Windows XP SP3 \Windows\Prefetch folder? I use Thunderbird 38.3.0. Why are there not file prefetch for Thunderbird in the \Windows\Prefetch folder?