I have been operating my MacBook Pro 15" (Mac OS 10.7.5), with Windows 7 - Parallels Desktop, for about one and one-half years. However, whenever I execute a Time Machine backup, and leave the system unattended (i.e. with screen top open) to complete the process, I return only to find that my system has re-booted, long before the back-up is completed.
For my only successful back-up (about 300 GB), I had to use sleep mode (screen top closed) continuously for unattended periods, until the backup completed over several days of extensive active operating periods.
I do not use the auto-backup feature because I do not see how to change the shedule for backups away from the default schedule of hourly backups (too my stain on performance).
Is there something that I am missing in setting up for such a back-up?
Is the fact of Windows 7 - Parallels Desktop contributing the problem?
I am currently operating away from home, using wi-fi for Internet access.
MacBook Pro (15-inch, Mid 2012), Mac OS X (10.7.5), Both cable modem & router included