Restore jobs fail if greater than 5 gigabytes

We have a situation where we have backup and restore jobs that have worked for a long time.  Recently the restore job began to fail.  The restore works fine if kept below 5 gigabytes.  Much over that and the job will fail.

 

I have patched the machine to SP5 and all applicable Windows patches have been applied.  The latest BIOS updates have not been applied.