I'm not sure if this is the correct forum, so please let me know where to go if this isn't the correct forum.
When I try to do a normal back up I get an error code (0x81000019). When I try to create a system image I get two error codes (0x807800A1 & 0x800423F4).
So far I've tried deleting temp files, setting Volume Shadow Copy and Windows Backup to "automatic" instead of "manual", and I did a few other things last night that aren't coming to mind at the moment.
Here is some system info:
-Windows 7 x64 Professional
-MBP retina (I got it during September 2012; not sure what specific model it is due to not having OS X anymore)
-No OS X; I do have Ubuntu 13.10 installed though
-I have an external HDD with 376.73 GB free (it's not a space issue)
If you need any other information, feel free to ask.