I have just installed radeon crimson software 64 bit for windows 8.1 on my laptop (Lenovo z50-75) and when I simply tried to check for updates, a message appears stating "unsupported 16 bit application". I double-checked to ensure that I downloaded the correct driver and I did. After that closes, another message appears, from windows, "this app can't run on your pc"? I uninstalled and re-installed the driver, but the same error occurs. Any ideas? Thanks.