User manual
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Note:
If your PC has 1GB of RAM or lower, keep the default setting;
If your PC has more than 1GB of RAM, you can allocate up to 1/4 to the virtual
machine, for example, 512MB out of 2GB memory could be allocated to virtual
machine.
5. If this is the first time you have installed VirtualBox, you need
to select Create new hard disk in the following window, and
then click Next
6. Click Next in the following window