My computer seems sluggish, as if the scheduled defrag is running and slowing down the computer as I work. How can I check to see if Defrag is running?
If you are using the computer, the ScheduledDefrag task should not be running. You shouldn’t see Defrag.exe or Dfrgntfs.exe in Task Manager, though you might catch Dfrgntfs.exe running for the couple seconds it takes to close after user activity is detected. (Note that these .exes run under SYSTEM, so you can’t see them in Task Manager without clicking the Show processes from all users button.) If, however, you started Defrag manually, then Defrag.exe and Dfrgntfs.exe will appear in Task Manager and won’t stop when user activity is detected. This manual defragmentation should not cause a significant impact on user activity thanks to defrag’s use of low-priority I/O and low priority CPU.
Which volumes does Defrag defragment?
In Windows Vista, Defrag defragments all volumes on the computer.
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