You are trying to install or update Adobe flash player and you encounter the following error: "Download success but checksum failed"
This error might have occurred if you are located in China and are trying to download or update flash player.
Since the support for the patches associated with Adobe Flash Player for the region (China) has been stopped, these patches shall not be shown missing anymore. Hence, if you are located in China, you can now download and update Flash Player from here. This is the official download site for Flash Player in the region and with the new site, you can experience improved site responsiveness and download speeds!