Why is Windows 7 willing to install updates and reboot a machine during a backup? Now, if this were a server, and I were running some third-party backup software, maybe you’d be able to convincingly mumble something about it being my responsibility to override the standard auto-update settings and schedule them for outside the backup window, but this is your own supplied automatic backup software on a consumer laptop. You know, the one that tries to run whenever it sees the backup drive connected and thinks now would be a good time to protect your data?

Left hand, meet right hand; you two should talk occasionally.