You can backup a windows computer to Time Capsule but I do not recommend it.
Any backup software that can use network target should work.
Macrium Reflect is one I use that I know works to Time Capsule.
Genius Time Line is a similar concept to Time Machine for PC.. it is more expensive than I would like to pay but there does appear to be a free version.. how good or bad or what limitations I don't know.
Internal MS backup software is by and large useless.. at least until Win 8.1 /10.
NOTE.. A USB drive plugged into the laptop and formatted native NTFS is far superior to backup on TC which is formatted HFS+ (unreadable to windows) which is networked as SMB and treaded as NT server with FAT32 with all its limitations.
Like many things you answer the question Can you .. Yes. Should you .. No.