將SIMATIC_S7_STEP7_V54_SP5.zip\Install_PftW\CD_1 中的Setups.ini配置文件用記事本打開
將[TERMS]中的
Term1=Registry%%\HKEY_LOCAL_MACHINE\SOFTWARE\Siemens\AUTSW\STEP7\ProdType%%REGSZ%%<>%%PC-EDITION%%TermMessage2%%0
Term2=Registry%%\HKEY_LOCAL_MACHINE\SOFTWARE\Siemens\AUTSW\S7PCT\InstType%%REGDWORD%%<>%%STANDALONE%%TermMessage3%%0
Term3=Registry%%\HKEY_LOCAL_MACHINE\SOFTWARE\Siemens\AUTSW\S7PCT\TechnVersion%%REGSZ%%=>%%2.0.0.0%%TermMessage3%%0
Term4=Registry%%\HKEY_LOCAL_MACHINE\SOFTWARE\SIEMENS\AUTSW\STEP7\Version%%REGSZ%%=>%%5.4%%TermMessage1%%1
修改為
;Term1=Registry%%\HKEY_LOCAL_MACHINE\SOFTWARE\Siemens\AUTSW\STEP7\ProdType%%REGSZ%%<>%%PC-EDITION%%TermMessage2%%0
Term1=
Term2=Registry%%\HKEY_LOCAL_MACHINE\SOFTWARE\Siemens\AUTSW\S7PCT\InstType%%REGDWORD%%<>%%STANDALONE%%TermMessage3%%0
Term3=Registry%%\HKEY_LOCAL_MACHINE\SOFTWARE\Siemens\AUTSW\S7PCT\TechnVersion%%REGSZ%%=>%%2.0.0.0%%TermMessage3%%0
Term4=Registry%%\HKEY_LOCAL_MACHINE\SOFTWARE\SIEMENS\AUTSW\STEP7\Version%%REGSZ%%=>%%5.4%%TermMessage1%%1
這樣就可以直接安裝，而不需要先安裝以前的版本了

其實我用window xp2直接安裝