Note: This information does not apply if you have used your Boot Camp partition in Fusion before. If this is not the first time you are trying to use your Boot Camp partition in Fusion, see A Boot Camp virtual machine fails to power on with a disk error (1003483)
This issue occurs when the partition created by Boot Camp Assistant is deleted and a new partition is created and formatted in its place (usually during the Windows installation process). The partition created by Boot Camp Assistant must not be deleted as that changes the partition table, making it impossible for Fusion to read and process the Boot Camp partition properly.
To properly install Windows in the Boot Camp partition, use the partition created by the Boot Camp Assistant. The partition needs to be formatted, but the Windows installer must not be allowed to create or delete any partitions. For more information, see the Boot Camp Installation & Setup Guide (Mac OS X v10.7 Lion) on the Apple website.
To resolve this issue, use Boot Camp Assistant to remove the BootCamp partition and re-create it, and then re-install Windows.
Alternatively, you can use vCenter Converter Standalone to convert the Boot Camp partition into a virtual machine, and use the virtual machine with Fusion. You can download Converter from the VMware Download Center . For more information on using Converter, see Best practices for using and troubleshooting VMware Converter (1004588).