3、STEP 7-Micro/WIN 的安装过程因为意外中止,造成不能卸载,也不能再次安装,出现这样的提示:
1. Searching local drives for valid install;
2. Unable to locate a valid executable for update,you must select the directory where your previous version of Micro/WIN or Micro/DOS is located;
3.Select Micro/WIN or Micro/DOS directory Path;
4.Still unable to locate a valid executable for update, or current version already installed. Installation aborted. 错误提示如下图,这种情况应该如何处理?