Nothing serious. Open the recovery partition and see what is in there. Files that don't belong there, move them to some other place. Happens all the time - possibly by the system file backup - did you backup files at some point in time using the system file backup facility ??
And there is probably nothing at all wrong with your C drive. What makes you think there is something wrong ??
The Kaspersky files definitely do not belong there. Move those to C. The others leave alone.
If you post a picture of your Disk Management, I could advise you how to create an additional partition to move your data away from C. Because if your system goes belly up and you have to reinstall, then you do not lose your files. In the interim, make frequent images but use free Macrium, not Win7 imaging which is a dog.