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安装STEP7-MicroWIN_V40_SP4时，出现如下问题，该怎么解决？1.Searchinglocaldrivesforvalidinstall;2.Unabletolocateavalidexecutableforupdate,youmustselectthedirectorywhereyourpreviousversionofMicro/WINorMicro/DOSislocated.3.SelectMicro/WINorMicro/DOSdirectoryPath:4.Stillunabletolocateavalidexecutableforupdate,orcurrentversionalreadyinstalled.Installationaborted.问题已解决，把下列内容：WindowsRegistryEditorVersion5.00[HKEY_LOCAL_MACHINE\Software\SIEMENS\MicroSystems\Common\Update320][HKEY_LOCAL_MACHINE\Software\SIEMENS\MicroSystems\Common\Toolbox\Components]CountLibs=dword:00000001复制到记事本中，扩展名改成.reg.然后双击，添加注册表信息。