If you were to install Win7 from scratch on a brand new empty drive (spinner or SSD, doesn't matter) and not change anything from the standard default installation options, you'd get TWO partitions:
(1) un-lettered "system reserved" 100MB, where Boot Manager (and boot menu, presented if you were to install a second or subsequent bootable OS after installing Win7 as the first bootable OS) is placed. This is also marked as the ACTIVE partition, so that the BIOS goes here to start the actual boot process.
(2) C-partition for the rest of the drive. This is where Windows itself gets installed, as a "system" drive.
In the case of Lenovo-provided machines, they have installed additional recovery tools, which are placed into that small un-lettered partition normally referred to as "system reserved" and only 100MB. Lenovo has enlarged the partition from the standard 100MB to about 1.5GB, but it's functionally identical in purpose. Also, it's been labeled "SYSTEM_DRV", rather than "System Reserved", but this is of no relevance.
And Lenovo's also added that additional Q-partition, which is where the "data" for system recovery is placed, in the event you needed to or wanted to restore your machine to initial factory state, exactly as it looked when it first came out of the box.
So... what's critical here is that standard Windows7 requires the TWO partitions: (1) ACTIVE partition, where Boot Manager and boot menu lives and where the BIOS goes to start the boot process on what is configured as the first hard drive in the boot sequence, and (2) C-partition because that is specified as the one-and-only bootable OS partition according to the default one-OS boot menu built by the Win7 installer and subsequently examined by Boot Manager at boot time. Since by default there is only one bootable OS you will not be presented with the boot menu, but instead Boot Manager will simply use that one-and-only OS and start it. If you had two or more bootable OS's, you'd get a boot list presented onscreen by Boot Manager, and you'd need to select which one to boot from within say 10 seconds else the default OS would automatically be booted.
Any "system image" backup requires BOTH of the above partitions to be checked, since [at least theoretically] BOTH of them need to be backed up and/or restored in tandem should you need to recover from a disaster. By backing and restoring BOTH, you guarantee a 100% working operating environment should you need to recover from a disaster.
Now the Q partition can be deleted (and its space re-allocated to either expand C, or perhaps in conjunction with shrinking the generally much too large C can be used to allocate one or more additional "data" partitions D, E, etc.) if you will NEVER need to or want to recover back to Lenovo's "factory-provided" out-of-the-box system setup. This could be the case if you use an alternative method for disaster recovery, such as using Macrium Reflect to take regular periodic (say once a week) "system image" backups, say to an external USB 3.0 drive.
So you could use Macrium Reflect to take an initial "system image" backup, which would effectively be your equivalent of the Lenovo-provided Q partition content, although you wouldn't need Q if you had to restore the Macrium "system image" backup. And then you'd just establish a weekly regime of further "system image" backups using Macrium, as your ongoing regular protection from a loss of Windows integrity which required some kind of restore to a prior working system. In this case it would be no older than last week's backup.
If you needed more current protection, just take more frequent "system image" backups (if you only have a C partition), or add a second backup tool like NovaBACKUP to take monthly/daily "data" backups (also to the external USB 3.0 drive).
==> You don't have "too many partitions". But the above description explains why you have what you have, and confirms that you can blow away Q if you have an alternative and superior backup/recovery method (such as Macrium Reflect) in case of a disaster.