All the tips/hints/fixes/other information posted here are at your own risk. Some of the steps here could result in damage to your computer. For example, using a Windows registry editor like RegEdit could result in unintended serious changes that may be difficult or impossible to reverse. Backups are always encouraged.

08 September 2007

Fine-Tune Windows Defender Scanning for Power Management

Within the Windows Defender options page, there are no choices to prevent scheduled scans while running on battery power or to restrict scans to running while the computer is at idle. However, Windows Defender uses simply the built-in Windows XP (or Vista, I assume) Task Scheduler. The Windows Defender scheduled task is hidden, so you might not realize at first that it is adjustable.

Go to Scheduled Tasks in Control Panel, and select Show Hidden Tasks from the Advanced menu. The Windows Defender item is "MP Scheduled Scan" with the run command:
"C:\Program Files\Windows Defender\MpCmdRun.exe" Scan -RestrictPrivileges

You can adjust settings for the scan to run only during idle or AC power as you like. Using the command above, you could also make a shortcut to run a quick scan whenever you like.

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