After a year with my lovely and powerful Windows 7 install, my 55G SSD drive started running out of disk space...
Browsing a little for solutions helped reclaiming some space:
But only after I have tried WinDirStat, I have managed to nail it.
The tool has highlighted that 50%! of the disk space has been allocated to: C:\Windows\ServiceProfiles\NetworkService\AppData\Local\Microsoft\Media Player\Art Cache\LocalMLS
which is managed by Windows Media Player Network Sharing Service.
Cleaning that directory helped and I enjoy my reclaimed disk capacity again. I have also followed suite and disabled the service as others, from MS forum, have done.