In the bios and Device Mgr. Only shows operating on one core. There is only one item entry. AMD A4-5000 APU with Radeon TM) HD Graphics. It means that only one core is recognized. BlueStacks Versions affected. BlueStacks Version below 4.140. Click on the gear icon and select settings. In the 'Settings' menu click on 'Engine' and then select the desired CPU cores. The changes will be applicable after restarting BlueStacks. Please refer to the image below.
Main PC:Win7 x64
8 GB RAM
Bluestacks 3 Download
GTX 970
i7 4770K 4.2 GHz
Installed a fresh version of Win 7 x32 in a Virtualbox, installed the guest addon and the Direct 3D thing. Installed Bluestacks with no issues. I can use the virutalbox just fine but when I start Bluestacks it does start but then it keeps loading forever and the virtual PC starts lagging as SPAM_SEARCH and the CPU usage goes up to 100% and stays there. The CPU usage on the main PC is just sitting stable at around 20%. I can't add more cores to the virtual machine...