Image processing task has failed with PlatformError fault: 23
You can see exactly what "23" means as it is actually a passthrough error from Windows.
C:\>net helpmsg 23
Data error (cyclic redundancy check).
http://www.vmware.com/support/converter/doc/releasenotes_conv302update1.html
Hot clone of Windows operating system fails
A local or remote hot clone of a Windows operating system to a virtual machine fails with the following error message: Image processing task has failed with Platform Error fault: 23. This message indicates a hardware failure error, which causes VMware Converter to stop cloning.
You can try a "chkdsk /R" on all partitions.
If the fault resides on free space, this can be avoided by resizing the partition smaller by at least 1mb in size. This forces a file-by-file clone thus working around free disk space.