After creating your Parallels virtual machine, you must configure it to provide at least 2 GB of RAM (preferrably 4 GB or more if available) to the Windows partition:
- Open the Parallels application.
- Select the virtual machine from the Parallels Virtual Machines window.
- Open the Virtual Machine menu and choose Configure…
- Drag the Memory slider to the right to allocate at least 2 GB of RAM memory to the virtual machine (preferably 4 GB or more if available).