Am having the problem with multiple instances of dllhost.exe running and consuming all CPU resources. Have run all available malware removal utilities - MalwareBytes, SpyBot, AdwCleaner, TDSSkiller, Windows Defender Offline, full system virus scan w/ Microsoft Security Essentials - problem not resolved. Also, something keeps resetting the IE security settings and preventing downloads. Error message: "Your current security settings do not allow this file to be downloaded." I reset IE defaults, things are normal for a while, then problems recur. Please help!