Scheduled Image Backup gives me strange warning before running.

I have created a biweekly task to create an image backup of my system. I have partitioned my Hard drive to C: for windows & program files and all other data in a drive named P: When I go through the image backup through windows' 'backup and restore' to an external harddrive I get no errors, however, when I run it from the task I have created the following warning appears at the cmd promptsee screen)

I am now scared that it is not going to backup all the necessary files in case something goes wrong. Could this be because in my command I have not added the 'recovery' drive that Dell comes with which has a factory recovery Image? If so, how do I add it on the command line as it's not really a letter drive (like C: ) or maybe I don't need it at all? I'm a bit confused on this one. thanks.

Thanks,Kaktussoft will try that :)

Of What exactly do you mean ?

I'm backing up the images though to an external hard drive. I change the name of "WindowsImageBackup" so that i have a few different versions for example.

I tried you trick and the warning didn't come up anymore so I believe it worked :)

So let's say I want to go back to the original image i backed up when i first installed windows and its programs, how does one go back ?
secondly, if I've fixed issues I've had with memory paging, drivers etc. one month later and at some point I want to go back to that particular image, how should I know which one it was if they are all called the same? Should I write myself a note of the date that I made it so that I can keep track or? Sorry if this all may seem obvious but I'm confused about it. Thanks