Adobe Acrobat reader 鼠标指针变成黑色方块的解决方案

如图所示，Adobe Acrobat reader使用一段时间之后，打开一个pdf文档，鼠标指针在空白的地方很奇怪的变成了一个黑方块，非常影响阅读体验：

Adobe 官网给出的解决方案：

Mouse pointer changes into a black box If your mouse cursor changes into a black box when moved over blank areas in a PDF document, use the solution below as a workaround. The problem is intermittent in nature, and reported for the May 2016 release of Acrobat Reader DC and Acrobat. Solution: Remove the icon cache file Adobe is working to resolve the issue. Meanwhile, follow these steps as a workaround: 1. Open the local appdata folder: C:UsersUSER_NAMEAppDataLocalAdobeAcrobatDC 2. Delete the following file in the local appdata folder: For Acrobat Reader DC: IconCacheRdr.dat For Acrobat DC: IconCacheAcro.dat 3. Relaunch Acrobat Reader DC or Acrobat DC.

也即打开这个目录： C:UsersUSER_NAMEAppDataLocalAdobeAcrobatDC 该目录下有 IconCacheRdr.dat文件，删除即可(以及文件名中 带“IconCache的.dat文件”)，然后重启Adobe Reader,鼠标指针变回正常状态：