Windows image files

Hi Guys, it appears that my backup image file is too large to do the back up. But that is only since I recently restored the C: Drive on my computer. Prior to this I could not get a backup to work so I got a new Windows 7 disk and installed it on the C Drive. Whereupon it made partitions etc. I haven't a clue as to what it did but I would like to resolve the problem with the partitions it established and see if that doesn't help.
Should a HARD Drive have a "healthy" OEM partition and a healthy primary partition??
Disk "0" is labeled System Reserved and C Healthy? (Boot, page file, crash dump, Primary Partitoin)
Disk 1 is labeled "Healthy (OEM partition)", Local disk D is "Healthy" (Primary partition) This is a separate hard drive installed on my computer.
i DON'T BELIEVE THAT DISK 1 SHOULD HAVE THE "OEM" PARTITION? Can anyone help me and then tell me what to do next?
Thanks
Here is what you requested>
Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Ultimate, Service Pack 1, 64 bit
Processor: Intel(R) Pentium(R) D CPU 3.40GHz, Intel64 Family 15 Model 6 Stepping 4
Processor Count: 2
RAM: 3582 Mb
Graphics Card: NVIDIA GeForce 9400 GT (Microsoft Corporation - WDDM v1.1), 1024 Mb
Hard Drives: C: Total - 76190 MB, Free - 30848 MB; D: Total - 476858 MB, Free - 317820 MB;
Motherboard: Dell Inc., 0HH807
Antivirus: Microsoft Security Essentials, Updated and Enabled