explorer.exe becomes very slow after enabling realtime protection

Hi

The process explorer.exe becomes too slow sometimes it doesn't load a folder while realtime protection is enabled and i have too disable it to load a folder like my downloads or any other folder. does it often behave like this or ...?

i just have a firewall and disabling it has not any effect on this issue...

i'm using adaware free version and it's up to date...
windows 7 64 everything is up to date and the pc is clean....

Thanks..