Up till about two days ago my CCleaner worked fine with no problems. Yesterday, however, I ran the cleaner and it said that close firefox to allow cleaning of the firefox cache. I had no firefox windows open and I tried reinstalling both CCleaner and firefox. The error kept on occuring and the firefox cache was never cleaned. This process was always skipped. CCleaner is an amazing program and I hope to have it running again soon. Someone please help me.