had issue with mse started 2 days ago the icon turned yellow warning unprotected due to overdue for scanning. well funny thing was i just did full scan night before. anyway, i rescanned, then did usual biz online, performed my usuall ritual of ccleaning just prior to shutdown. next morning that damm warning was back. hmmm. searched on live search found this...
MSE shows "potentially unprotected....you haven't run a scan - Microsoft Answers
read thru till end where the mod there replied...
seems new version of ccleaner auto wipes mse logs
followed his advice. open ccleaner click on apps uncheck all ms under windows. rescan. restart. yeah mse stays green.