I've been getting these error MESSAGES, using Scheduled Tasks to do Check Disk and Defrag on my two HARD drives:

5/18/10 it did not Defrag C:, got exit code of 0x6

9/21/10 It did not Check Disk D:, cannot lock current drive, volume dismounted, all opened handles to this volume are now invalid

I think I just need to disable some services, then it will work.  Everything I've figured out is here, I think I'm close:

http://www.codeproject.com/Questions/117564/DOS-commmands-to-disable-re-enable-non-MS-Services.aspx?display=Print

This is what I have that needs to be modified somehow.  The code just flashes on the screen.  Thank you for your input.

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sc config avg9wd start= disabled
sc config CTAudSvcService start= disabled
sc config nvsvc start= disabled

ECHO y|CHKDSK D: /X/R
ECHO y|CHKDSK C: /R

C:\WINDOWS\system32\defrag.exe d: -v>"c:\Documents and Settings\Administrator\Desktop\defrag d.txt"
C:\WINDOWS\system32\defrag.exe c: -v>"c:\Documents and Settings\Administrator\Desktop\defrag c.txt"

sc config avg9wd start= auto
sc config CTAudSvcService start= auto
sc config nvsvc start= auto

SHUTDOWN -rI PUT my conclusion here at the bottom of this page.

http://www.codeproject.com/Questions/117564/DOS-commmands-to-disable-re-enable-non-MS-Services.aspx

It does not appear to me that a DOS command can disable some Services

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Control Panel \ Network Connections \ [right-click] Local Area Connection 5 \ Disable

Start \ Run \ msconfig \
Services tab \ [check] Hide All Microsoft Services \ Disable All \ Apply
Startup tab \ Disable All \ Apply
Close \ Restart

Then let Scheduled Tasks run the following bat file at 1:00 AM, on the third Tuesday of every month, view the RESULTS in the AM.

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C:\WINDOWS\system32\defrag.exe c: -v>"c:\Documents and Settings\Administrator\Desktop\defrag c.txt"
C:\WINDOWS\system32\defrag.exe d: -v>"c:\Documents and Settings\Administrator\Desktop\defrag d.txt"

ECHO y|CHKDSK C: /R
ECHO y|CHKDSK D: /X/R

SHUTDOWN -r