Hi,
try the following steps:
1) uninstall flash completely
2) restart computer
3) install newest flash
4) restart computer
If you still face the issue please specify the following :
Is there an error or does the installation just hang at 95% percent? If it returns an error, what is the error? We'll need the Flash Player installation log files to investigate further. Please do the following:
- Review the FAQ Where do I find the Flash Player installation log on the Macintosh?
- Configure your system to obtain the install.log and FlashPlayerInstallManager.log files
- Attempt to install Flash Player again. When the installation hangs (or returns an error), close out of the installation window
- Upload the install.log file (only the portion related to the Flash Player installation) and the FlashInstallManager.log (entire file) to cloud.acrobat.com/send using the instructions at How to share a document
- Post the link to the uploaded log files in your reply
Thanks!