Explorer.exe freezes when F-Secure is processing a threat
I have noticed that when F-Secure detects and processes a new or complex malware sample (typically detected as Trojan:W32/Generic.xxx!Online or something like Trojan.TR/Crypt.XPACK.Gen) and I right click on it, Explorer.exe is likely to temporarily freeze. After the disinfection process completes, everything returns to normal.
In my opinion, this is probably because F-Secure is looking for online virus definitions or employing some advanced heuristic detection technique to identify and remove new threats.
That being said, I still hope F-Secure can improve the detection and disinfection process, so that Explorer.exe does not freeze or crash.