OK.. Finally got it working fine on my pc.. switches i used to silently install: winzip32.exe /noqp /autoinstall and then imported the registration key: regedit /s winzip.reg the reg key entries i had were: Windows Registry Editor Version 5.00 [HKEY_CURRENT_USER\Software\Nico Mak Computing\WinZip\WinIni] "UZQF"="D080" "win32_version"="6.3-10.0" "Name1"="NAME" "SN1"="KEY" [HKEY_LOCAL_MACHINE\SOFTWARE\Nico Mak Computing\WinZip\WinIni] "UZQF"="D080" "Setup"="0" "win32_version"="6.3-10.0" "Name1"="NAME" "SN1"="KEY" dont forget to place ur name and the key values in the registry .. try it out and tell me if it works 4 u...