If the computer is under heavy load, it is due to SQL temp files which can grow large if it is not set back to the default size regularly.
This usually results from a malware infection, most often on someone else's machine.
It is therefore urgent to move all Macs to SAV9 by April 2014.
If you have no Windows Server, and can no longer use SUM, this leaves two more possibilities, first you could use the standalone SAV9 installer.
There is little you can do about this other than always keeping your own machine up-to-date with anti-virus software and system updates. Deleted Nexus items go to your Deleted Items folder.
If you have a computer with Windows Vista or newer, OS X 10.7 or newer, or Linux, or an i OS device (i Phone, i Pad, i Pod touch), then you can download an automatic Configuration Assistant Tool.
Otherwise, we have manual setup instructions for a wide range of devices.
You want to install clients from previous releases to your version 10 Comm Cell.
An additional setting must be created on the Comm Serve and client computer.