Even with the correct driver, Windows 7 requires specific services to be active.

: Scroll down to the Driver section, locate the Bluetooth Driver , and click Download . Install :

The Acer Aspire 4730z is an older notebook (circa 2008-2009). It did not come with built-in Bluetooth as a standard feature on all models. Many units shipped with Bluetooth as an optional extra. If you have never used Bluetooth on this laptop before, it may not have the hardware.

I can't download the Bluetooth support files - Acer Community

to get drivers specific to your exact hardware configuration. Windows 7 (32-bit or 64-bit) from the operating system dropdown menu. Look under the