What is OEM?
That's exactly what I was thinking, I've only had the laptop for the day as well, so if I was to have a USB external HD would that be able to boot the recovery at start up if the HD fails, wouldn't the drivers also fail?
But if I was to save it on to my HD other than on lenovo, where would I save it to? Windows7 doesn't make sense to back it up to?
OEM stands for Original Equipment Manufacturer. In this particular case, OEM means that it was placed there by Lenovo (the OEM of your PC).
A Windows installation on a PC made by a home builder would not have a Lenovo partition or an OEM partition---and might not even have that "System_DRV" partition. My primary drive has exactly 1 partition: C.
Your OEM partition contains something Lenovo wants you to have. Possibly tools, possibly some files necessary to restore your PC to factory specifications. I would not delete it or alter it in any way unless you knew for certain exactly what it contained and knew for a fact that you had no interest in whatever it was designed to do.
If you make a Macrium image, you don't then "boot the recovery at startup" from a USB external. You boot from a burned CD you have personally made. You examine the interface provided by that burned CD and then select the image file you previously made that you intend to restore---and the location to which you want to restore it. If that CD does not boot, you cannot restore.
If you are using Windows built-in imaging, I assume you boot from a Windows install disc or a Windows repair disk. I dunno---I don't use it.
You CANNOT save an image file to a partition contained in the image. So, an image of C cannot be saved to C. Which leaves your 3 smaller partitions. NONE of them are good choices for several reasons, such as:
They are quite small and image files can be quite large.
They are best left alone as they have a specific purpose that you should not interfere with.
All 3 of those partitions are on your only hard drive. If that drive drops dead, your saved image file is also dead and gone.
That's why you need some other drive, probably external.
Incidentally---if you do decide to image your C partition, you also need to make an image of that "System_DRV" partition. Windows needs it to boot.