in first sorry for poor english.
when i try install version "3.4.7" in windows (8.1) show this error: Unable install/uninstall disk driver. The system cannot find the path specified
before this, i have version 3.4.5 and work good,then uninstall it and manually remove some file from system32 and some key from registry.
Unfortunately there's no way to install it manually because the installer calls a number of OS functions. This error suggests something is not right with the OS, but I am afraid I can't help you with that. It's a free product after all.