You cannot create Windows Virtual machine. Installation fails with error message:
"The Unattend answer file contains an invalid product key. Either remove the invalid key or provide a valid product key in the unattend answer file to proceed with Windows installation"
- The product key you entered in Parallels Wizard is invalid or was mistyped
- The unattend.xml file created using the product key contains errors
Stop the current installation.
Go to Parallels Desktop menu bar ► File ► New...
- Follow the New Virtual Machine installation wizard to create a new Virtual Machine. Make sure your Windows product key is valid and you type it correctly in the "Product key" field.
Alternatively you may just clear "this version requires product key" checkbox and proceed with installation.
In this case after Windows is installed go to Start ► right-click Computer ► click Properties ► click Activate Windows now.
To know more about Windows activation please visit https://windows.microsoft.com/en-IN/windows7/activate-windows-7-on-this-computer