In this tweak I will show you how to defrag from the command prompt, it's simple and requires no batch file.

1. Open the Command Prompt with Start -> All Programs -> Accessories -> Command Prompt.
    
2. Now type at /? then enter and were presented with these options:
   
   AT [\\computername] [ [id] [/DELETE] | /DELETE [/YES]]
   AT [\\computername] time [/INTERACTIVE]
   [ /EVERY:date[,...] | /NEXT:date[,...]] "command"
    
   • \\computername Specifies a remote computer. Commands are scheduled on the local computer if this parameter is omitted.
   • id Is an identification number assigned to a scheduled command.
   • /delete Cancels a scheduled command. If id is omitted, all the scheduled commands on the computer are canceled.
   • /yes Used with cancel all jobs command when no further confirmation is desired.
   • time Specifies the time when command is to run.
   • /interactive Allows the job to interact with the desktop of the user who is logged on at the time the job runs.
   • /every:date[,...] Runs the command on each specified day(s) of the week or month. If date is omitted, the current day of the month is assumed.
   • /next:date[,...] Runs the specified command on the next occurrence of the day (for example, next Thursday). If date is omitted, the current day of the month is assumed.
   • "command" Is the Windows NT command, or batch program to be run.
      
3. I want to defrag my hard drive c: on Monday, Wednesday, and Friday at 11 p.m. and keep it interactive. (allows visual progress).
   
   C:\>at 23:00 /interactive /every:M,W,F defrag c:
   
   and I'm presented with:
   
   C:\Documents and Settings\XPUSER>at 23:00 /interactive /every:M,W,F defrag c:
   Added a new job with job ID = 1
    
4. To list your scheduled jobs, just type at at the prompt, then enter:
   
   C:\Documents and Settings\horstl>at
   Status ID Day Time Command Line
   ------------------------------------------------------------------
   1 Each M W F 11:00 PM defrag c:
   
   To delete pending jobs, just follow the syntax:
   
   /delete Cancel a scheduled command. If id is omitted, all the scheduled commands on the computer are canceled.
   
   So to cancel my job with ID 1:
   
   at 1 /delete