Windows: StartupSelector is a simple application for saving your Windows startup configuration and swapping it with previous backups for customisable startup configurations on the fly.
After installing StartupSelector you can do two things: save your current startup configuration or restore a previous backup. Whether you want to see if radical changes to your startup configuration actually make a difference in your boot time or you routinely switch between what applications you need to access right after boot, StartupSelector can help.
StartupSelector is freeware, Windows only. Have a favourite application for tweaking your startup routine? Let's hear about it in the comments.