W8. 1, after installing office, there should be more than a dozen G's. Now drive C has occupied more than 40 G, and one or two G's are added every hour or two.
It is you who choose to update automatically. Patching will reduce the capacity of drive C, and the downloaded patch also exists in the system. My WIN8. 1 didn't choose automatic update, but the housekeeper chose it for me. I only patched the high-risk vulnerability, and now I only use more than 20G for the C drive. Use Wise? Disk? Clean cclean and slim down the system.