Computers with no name and very little inventory data show in the console. Often if these are deleted, they get recreated.
This issue can be caused by a number of factors: an agent contained in an OS image, resource merging, invalid records being imported from active directory.
A simple solution to this issue is to stage a script to run nightly which will delete these empty records. The script looks for computers with a null name and inserts them into Item to Delete.
To stage the script, create a new task, "Run SQL Query on Server" and insert the attached query. Schedule to run nightly.