Randomizing scans to improve computer performance in virtualized environments on Windows clients

You can randomize scheduled scans to improve performance on Windows client computers. Randomization is important in virtualized environments.
For example, you might schedule scans to run at 8:00 P.M. If you select a four-hour time interval, scans on client computers start at a randomized time between 8:00 P.M. and 12:00 A.M.
  1. To randomize scans to improve computer performance in virtualized environments
  2. In the console, open a Virus and Spyware Protection policy.
  3. Under
    Windows Settings
    , click
    Administrator-defined Scans
    .
  4. Create a new scheduled scan or select an existing scheduled scan to edit.
  5. In the
    Add Scheduled Scan
    or
    Edit Scheduled Scan
    dialog box, click the
    Schedule
    tab.
  6. Under
    Scanning Schedule
    , select how often the scan should run.
  7. Under
    Scan Duration
    , check
    Scan for up to
    and select the number of hours. The number of hours controls the time interval during which scans are randomized.
  8. Make sure that you enable
    Randomize scan start time within this period (recommended in VMs)
    .
  9. Click
    OK
    .
  10. Make sure that you apply the policy to the group that includes the computers that run Virtual Machines.