Does anyone by any chance know how to reactivate the menu which normally pops up when you right-click a hard disk letter (e.g. C) or a folder name in the explorer? When I try to do this nothing happens. I have WIN XP with SP3 installed. My vague guess is that something went wrong in the registry.
I've found a solution to my 2nd problem - the one about the missing context menus in the WIN Explorer:I had to 'hack' the registry. Somehow (maybe caused by the trojans) an entry had disappeared from the registry. I had to browse to HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Policies\Explorer, create the key 'NoViewConextMenu' and assign it the REG_DWORD value '0'. This makes context menus become visible again.
As regards my Trojan 'friends' I've caught two of them.