Using Returnil RSS v. REL 13, SkyDrive 17.02003.1112, Windows 7 x64. The SkyDrive directory that contains the files to be backed up is not in C:. Problem Enter virtual mode. Upload some files to update the backups in the cloud with SkyDrive. The process finishes normally. Reboot. The boot is normal, but an error message about Skydrive appears. It asks for a new reboot or a reinstallation of Skydrive. SkyDrive "dissapears" from the system. Usually another reboot solves the problem. I´m not sure if the problem remains after SkyDrive is uninstalled and reinstalled (I´ll check later). Update: it seems that Returnil must be installed before SkyDrive to avoid the problem.