Uninstall flash from your control panel and with uninstaller just to be sure, restart

In the installer package which i will link in reply to this (or just google same version) right click the file: flashplayer32_0r0_344_winax.exe

Select: properties > compatibility mode

Check the box from compatibility mode and then select “Windows 7” from the drop down

Now install that file, and you must select never check for updates at the end!