Yep No sign of troubles… With Avast! fully turned on (standard, mail /POP3-SMTP/, p2p and IM protection) running tcmdr650.exe opens an empty dark-blue installer window and… that’s all, perfect silence Task manager shows two Installation of Total Commander apps running (on processes tab there are install.exe and tcmdr650.exe) First I tought that it was an initial unpacking problem but manual unpacking and running install.exe gives the same results (and the machine is rather powerfull - PIV 3.0 HT@512 DDR RAM) As I mentioned before - after turning off Avast! - by stopping services and resident protection and killing ashdisp.exe process - TC installed succesfully. P.S. I almost forgot - I’m using Home Edition