i found out that the /s wasn't the right switch for this version 2.6.9. here is the corrent one for Abc [Another Bittorrent Client]

the code:

start /wait %system%\install\ABC\ABC-win32-v2.6.9.exe /s /v /qb

i thought i would share it with ppl.

this works 100%

This is what I use (and it's always worked for me). Maybe it needs a capital 'S'.

REG ADD %KEY%\045 /V 1 /D "%systemdrive%\software\ABC-win32-v2.6.9.exe /S" /f

don't wanna be redundant as it has been said before and is posted in the application switches STICKY thread but yes, for every version of ABC "/S" switch (capital sensitive) works.