Cannot defrag my computer since installing Windows 8.1?

I have the same issue. I have performed all suggested actions - but not luck. My C drive continuous to report 14% fragmentation.

The strange thing is that I used third party defragmentation software, which performed defragmentation and drive optimization reporting 0% fragmentation, BUT windows still reports 14% fragmentation! I don't understand!

Will it Defrag completely if you run it from Safe Mode, or if you try a Clean Boot?

How to start Windows 8 in Safe Mode

http://www.bleepingcomputer.com/tutorials/start-windows-8-in-safe-mode/

How to perform a clean boot to troubleshoot a problem in Windows Vista, Windows 7, or Windows 8

http://support.microsoft.com/default.aspx/kb/929135

If a program like Norton is the possible cause it may be necessary to uninstall such a program to properly test whether such a program is the cause.

Will the Defrag work if you enable the built-in Administrator and run it via that user?

This EXAMPLE (ONLY) might or might not work for you with your Defrag program it uses the built-in Administrator account to perform it?

"It seems that the "Run as administrator" command only gives you some administrative privileges, and they're not enough to install Java (and OpenOffice, by association). In order to get around this, you need to actually log into the built-in administrator.   Open a Command Prompt (Admin) with admin rights by  using the Windows Key + X and selecting that option.   At the prompt, type:

net user administrator /active:yes

Then log out of your regular account and back in as the built-in administrator, where you might be able to install the update.  When you're done, log back into your regular account and, for security purposes, disable the built-in administrator account using:

net user administrator /active:no "

I tried what was recommended and it did not work.  When I had Windows 8, I could defragment my hard drive perfectly with no problems whatsoever, but as soon as I downloaded Windows 8.1 I can no longer defragment my Hard Drive, it simply will not defragment with Windows 8.1. I do not want Windows 8.1 anymore, please tell me how I can go back to Windows 8.  Thank you.

Do any of these commands work from an Elevated Command Prompt?  See the first link for what the commands do.

defrag c: -a -v

defrag c: -v -r

defrag c: -v -w

How to Perform a Full Manual Defragmentation of Your Hard Disk Under Windows Vista

http://www.howtohaven.com/system/vistadefragmentation.shtml

Windows 8 – Elevated Command Prompt

http://www.tweakhound.com/2012/11/12/windows-8-elevated-command-prompt/

Returning to Windows 8 is easier said than done thanks to Microsoft damaging the Windows 8 Recovery Partition.

How to uninstall Windows 8.1

http://www.lohud.com/usatoday/article/3476743

How to uninstall Windows 8.1

http://howto.cnet.com/8301-11310_39-57610729-285/how-to-uninstall-windows-8.1/

Windows 8.1 Update Leaves OEM Owners With Broken Restore Function

http://www.technologytell.com/gadgets/133905/windows-8-1-update-leaves-oem-owners-with-broken-restore-function/

How to Create Recovery Media before Installing Windows 8.1

http://windowsitpro.com/windows-8/how-create-recovery-media-installing-windows-81

Update to Windows 8.1: FAQ

http://windows.microsoft.com/en-in/windows-8/upgrade-to-windows-8

Thank you for your suggestions. Unfortunately none worked!

I had, prior to your suggestion, uninstalled Norton 360 and tried defrag then but no luck.

Running defrag from the command prompt, did nothing I.e. did not even run the program.

The worst is that the disk fragmentation is climbing (went from 14% to 16%) - I guess we need a solution soon!