Hello, I want to know what is the minimum system requirements for Windows to operate with syncthing?
Depends a lot on how much data you want to sync and on the performance you expect. But anything that runs a recent version of Windows and has some RAM free (average use is at ~100MiB according to https://data.syncthing.net/, better have some more since it increases while syncing) should be fine.
Windows 8 x64 min. 1 GB RAM, 2 GB HDD