JSutils for Energy Saving Windows Shutdown Utilities and Energy Use Calculators
JSutils Compact Disk

CPUOff Lite Introduction

Latest Version: 2.3
Size: 375KB
Released: 24-September--2008
CPUOff Lite icon

This program is no longer being supported or maintained

Check out the shutdown utilities index or the shutdown utilities product selector for current utilities

CPUOff Lite monitors the CPU load and initiates computer power off after the average CPU load has been below 15% for more than 60 seconds. The program activates 2 seconds after starting and shuts down 60 seconds after power off is initiated unless power off is cancelled. CPUOff Lite is part of the JSutils group of software utilities which have a theme of energy conservation. To find more energy and money saving ideas check out Practical Home Energy Saving.

Uses of CPUOff Lite include unattended backup (or other processor intensive operations), shutting down the computer when the backup has completed. It can be started via the Windows Task Scheduler, on start up or manually at the same time as the backup is initiated. This is a great little utility for saving energy by making sure a computer switches off when it has finished a task.

The program requires a registration code to run - this can be obtained free for personal non commercial use from the Download page. Registration codes from previous versions are compatible with version 2.3. For commercial licencing please click here.

Installation is simple just unzip the installer CPUOffL.exe from the downloaded file CPUOffL.zip, double click on the installer and follow the on screen instructions (when selected, shortcuts are installed for all users). As well as installing the program this will also install the help pages. Start the program and enter the registration code to start using CPUOff Lite. CPUOff Lite supports Windows 2000, Windows XP, Windows 2003 and Windows Vista. The program needs administrator privileges to install. When upgrading from a version prior to version 1.3 any existing log file will be moved from the program directory to the program\log directory.

CPUOff Lite runs in the System Tray (the program can be made visible by double clicking on the tray icon). Once power off is initiated CPUOff Lite switches to visible 'run on top' and the About, Exit and Test buttons are disabled. Power off can be cancelled by clicking the Cancel button which will put the program back inthe System Tray unless the program was already visible. Program operation is inhibited while the About screen is open, this screen will automatically time out after 30 seconds if left open.

CPUOff Lite operates by checking the average CPU load once a second and comparing it with a preset threshold, each time the average CPU load exceeds 15% the countdown timer is reset until the countdown time is reached and power off is initiated. The computer will power off 60 seconds after power off is initiated, click Cancel during this time to reset the program. Averaging works by adding the CPU load measured every second over an averaging period of 5 seconds and dividing it by the averaging period. This does mean that the average load can increase after the instantaneous CPU load has decreased due to previous values. This is especially noticeable with wide variations in CPU load. If the time the program has been active is less than the averaging period the time active is used as the averaging period.

Click on the Test button to enable Test Mode which reduces both the power off delay and the monitoring period to 5 seconds and puts up a pop up rather than powering off the computer. Clicking the Test button while in Test Mode will reinitialise the program. Click Reset to exit Test Mode or to reset the program in operational Mode..

The program consumes very little system resources but it does run with a high priority. Power Off has been configured to force all running applications to close. For information about the log file see Log File. It is only possible to run one instance of CPUOff Lite at a time. If CPUOff Lite is in power off mode when an attempt to start a second instance occurs the error message will open beneath the first program window which will take priority.

The Release Notes contain installation instructions, details of any issues known at the time of release plus other useful information.

To find out what is new and changed in version 2.3 have a look at History.

If you have a problem with this program, have any suggestions for improvement or have a novel use for it then let us know. Before reporting a problem always check the Release Notes, FAQ and Known Issues.