note:ESOP is a software used in xxxxx.

问题描述：

      升级至IE8后，电脑里未安装Adobe acrobat 7.0或者更高版本，只安装了Reader软件，当打开PDF文件时，每次都需要指定关联软件。

解决办法：

1) Go to Start --> Settings --> Control Panel--> Folder Options

2) A popup will appear. Select the 'File Types' tab.

3) Click on 'New'.

4) Click on 'Advanced'

5) Provide the following in the input boxes:

File Extension: wpdfAssociated File Type: Adobe Acrobat 7.0 Document [Select this file type from the dropdown list]