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You are here: Home / Operating System / Command Prompt / How to delete OEM Partition

Nov 3, 2009 By Jared Heinrichs 238 Comments

How to delete OEM Partition

This post will cover how to delete an OEM Partition. OEM partitions can be made by Dell or Lenovo. If you use the GUI Disk Management tools you’ll notice you can’t delete the OEM Partition. In order to delete the OEM partition you are going to need to use a command line tool called Diskpart.

First of all this is probably what you are currently looking at:

image

If you hit “DELETE” on the OEM Partition you can’t delete it like other partitions. If you right click on the OEM partition you will notice you don’t have the same options.

image

Normally you’d see:

image

To delete the OEM partition you are going to need to hit “Windows Key” + “R”. This will open the run dialogue box. Type “diskpart” and hit “OK”.

image

This will open a black command prompt like window. Type “list disk”. This will display all the disks.

image

You can verify which disk you want to edit using the “Disk Management Tools”. The Disk management tools can be found by Right Clicking Computer and selecting “Management”.As you can tell from the first screen shot in this post the OEM partition is located on Disk 2.

You must now select the disk with the OEM partition on it. Again in my case it is “Disk 2”. To select the disk you must type “select disk 2”.

image

You can now type “list partition” to list all the partitions on the disk just in case you want to verify you absolutely have the right disk selected.

image

You must now select the partition. In my case it is “Partition 1”. To do this you must type the command “select partition 1”.

image

Now type “delete partition override”.

image

Once you do that you have officially removed the OEM partition on the drive! Congratulations!

Filed Under: Command Prompt

Comments

  1. Shumayl Arshad says

    Sep 27, 2012 at 7:55 am

    thanks. worked like a charm

  2. Colin Stafford says

    Oct 28, 2012 at 8:04 am

    Excellent instructions; easy to follow. Allowed me to free up 5 GB of unknown OEM stuff on an Acer laptop. Thanks, Jared!!

  3. squirrel says

    Oct 31, 2012 at 7:43 am

    You save me !

  4. Hugo says

    Nov 2, 2012 at 11:21 am

    Great guide. Thank you

  5. Charlie says

    Dec 16, 2012 at 10:28 am

    I keep getting this response when trying the final step:

    The specified command or parameters are not supported on this system.

    Any help in this matter? ideas?

  6. Charlie says

    Dec 16, 2012 at 10:54 am

    I stumbled upon some older comments I did not see before about converting to the partition to basic but this also did not help. In the end I started to get frustrated and read the help menu in diskpart. I ended up selecting the disk and running the command “clean” Then I was able to add a volume and format the whole drive and now have no partitions 🙂 Thanks for your article. It pointed me in the right direction 🙂

  7. Etienne says

    Dec 21, 2012 at 10:57 pm

    Nice stuff !

  8. Larry says

    Jan 4, 2013 at 11:02 am

    Very nice tutorial. Worked like a charm! Thanks!

  9. Wj says

    Jan 11, 2013 at 2:40 pm

    Hi Guys,

    I followed all steps listed but the command window did not show all my partitions but only listed C:, at least I can see my D: overthere and plus a unamed primary(I named it after,but still not showing) partition and a OEM partition.

    I could not find out what I was doing wrong, I just wanted to delete either the OEM or the unamed primary one.

    I am running windows 7 64 and working on a Lenovo Ideapad V570. As I have got 4 partition so I could not create one more, but I do need one more other D: for my data backup.

    Please helep….Thanks in millions!

  10. jannes says

    Jan 23, 2013 at 4:23 am

    Thank you. I works Great!!!! no need to install any other programs!!!!!!

  11. Dave says

    Jan 23, 2013 at 11:23 am

    Fantastic guide, helped me reclaim missing space from my 750GB portable hard disk.

  12. abhishek says

    Jan 25, 2013 at 11:50 am

    thank you very much sir . i was really disturb . thank you for your help.

  13. Wilson Chan says

    Jan 27, 2013 at 3:30 am

    Thanks for this Jared. Great and clear instruction.

  14. Ryan says

    Jan 30, 2013 at 9:14 am

    Thank you very much for posting this!

    We just bought a new desktop PC with a 1 TB hard drive, and after one week I was looking at the properties for the C: partition and noticed that it only had 60 GB left! So I opened Disk Management and saw that Asus had configured a 768GB OEM Drive! Needless to say, I am not able to access this drive or use the space in any way (I wonder why in the heck they had to use 3/4 of my hard drive for OEM purposes – a little excessive?), but I am going to give this a shot and reclaim my hard drive.

    Thanks again, you’ve saved me 768 GB!

  15. RamNemesis says

    Jan 31, 2013 at 1:01 am

    2013 and this is still needed?
    Got an extra 5gb now.
    great thanks alot for the time and effort.

  16. Dave P. says

    Feb 2, 2013 at 9:08 am

    Thanks. Great tutorial. Definite bookmark material.

  17. Thad says

    Feb 3, 2013 at 11:39 am

    Jared Heinrichs procedure for “overriding” partition deletion protection was accurate and organized for ready use.

    Top drawer work!

    Thanks Mr. Heinrichs

  18. Sandman192 says

    Feb 9, 2013 at 1:12 pm

    I just deleted all the partitions and had the OEM to deal with and this helped me allot. When I went to command prompt and deleted the OEM and went back to Computer Management and I had the hole Unallocated drive and the OEM is gone. This is great if you buy an refurbished drive and they didn’t clean it before the resold it.

  19. sureshkanna says

    Feb 12, 2013 at 6:27 am

    thanks its working fine……………

  20. Oskar says

    Feb 19, 2013 at 1:38 pm

    Thanks! =)

  21. stealth says

    Mar 3, 2013 at 12:40 pm

    Just a Thank you

  22. stockstradr says

    Mar 7, 2013 at 10:42 pm

    Thank you! Great guide

  23. mahesh says

    Mar 8, 2013 at 3:19 am

    Thanks for the awesome post

  24. withfries2 says

    Mar 10, 2013 at 4:05 pm

    Thanks for the instructions, super helpful this weekend while helping my mother in law refresh her aging PC with a SSD.

  25. Pasi says

    Mar 15, 2013 at 8:46 am

    Excellent article. Thank you, good Sir.

  26. Vishal says

    Mar 29, 2013 at 10:13 am

    Thank you so much for this great help 🙂

  27. yabesh says

    Apr 4, 2013 at 1:25 pm

    Thank you verymuch….. sir

  28. saley says

    Apr 5, 2013 at 12:07 pm

    Thanks man very cool and simple…. also i like to use cmd!

  29. Azeem says

    Apr 11, 2013 at 11:28 pm

    Wooowwww… thanks a lot Mr.

    I had little bit tension about this before.

    It’s a very good tutorial for me… I have deleted my OEM Partition according to your instructions.

    Thanks

  30. Richard Wale says

    May 31, 2013 at 10:19 am

    Excellent – I wanted to use the original Dell C Drive as an additional non-bootable drive, so did not need/want the OEM partition.

    Very simple instructions, worked superbly, thanks very much indeed!

  31. Jen Chambers says

    Jun 3, 2013 at 12:17 pm

    THANK YOU SO MUCH!

    This really was a huge help, my SSD had crashed on my ASUS notebook and when I got it back I found an OEM partition that I was unable to uninstall, which left me with just little over 18gb of space. Not enough to install Windows. So thanks so much! You saved my SSD!

    -Jen Chambers

  32. Chris says

    Jun 4, 2013 at 9:02 pm

    Nicely written, Jared.
    very easy to follow.
    thanks

  33. Dave says

    Jun 30, 2013 at 8:36 pm

    Excellent instructions, thanks!

  34. R says

    Aug 10, 2013 at 6:31 am

    Thanks. Very helpful.

  35. ifti says

    Aug 30, 2013 at 4:02 am

    wow

    worked first time!

    thanks for this

  36. Samay says

    Sep 3, 2013 at 8:27 am

    Is there a way to recover my data from OEM partition.

    I don’t know how but I accidently changed my 100 gb disk drive into an oem partition. I cannot delete the partition as it contains important documents n files.

  37. Carlos says

    Sep 5, 2013 at 6:28 am

    Thanks man for sharing. Helped out.

  38. Saqib says

    Sep 9, 2013 at 10:28 am

    HI
    great …….. can you help me in my problem ….

    I recover my dell inspiron with win 8 to factory image before recovery I had four drives C for OS, D for WinRE, F and G for my data. after recovery it is now showing only C, D and G as F. disk management tool is showing my previous F drive 146 GB as OEM partition with 96 GB free space amount similar to my old data . can I recover this OEM partition back with data ????????????? please need help

  39. CHUNKY says

    Sep 16, 2013 at 3:03 am

    U ARE GREAT… I REALLY PISSED OFF SEARCHING VARIOUS WEBSITES…AFTER FORMATTING MY 210GB DATA SHOWING IN OEM…GREAT JOB.

  40. Zver1248 says

    Oct 18, 2013 at 5:29 am

    Спасибо Большое вы очень помогли !!!!

  41. hobzzz says

    Oct 31, 2013 at 2:43 pm

    You are the man Jared!!!!

    Worked like a charm!

  42. Roger says

    Nov 1, 2013 at 5:36 am

    Thanks – much appreciated.

  43. pema says

    Dec 6, 2013 at 11:58 am

    Delete?????
    If we delete the omc partion then would we that amount of space back on laptop????

  44. oneye says

    Dec 12, 2013 at 8:15 pm

    Nice! Worked for me 🙂

  45. Ron Modesitt says

    Dec 19, 2013 at 6:01 pm

    Works great. Many thanks.

  46. Sanjay_K says

    Feb 5, 2014 at 9:17 pm

    Thank you so much….

  47. Gunther says

    Feb 9, 2014 at 1:36 pm

    Thanks a lot, worked for me on a WD Raptor, with a Dell OEM XP partition. It’s gone 🙂

  48. mauirixxx says

    Feb 10, 2014 at 12:27 pm

    many years later, this guide is still helpful, thanks 😀

  49. raf_qpsk says

    Feb 22, 2014 at 2:57 pm

    Great Howto! Really help me out.
    Thanks alot.

  50. Rafael says

    Mar 2, 2014 at 11:33 am

    Thank you very much!!!

    I used Dell recovery tool to restore my system to original state, and then the 500gb partition I used to store data simply turned into OEM.

    It was driving me crazy and this guide solved my problem perfectly!

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