Mabe this would help  just for data Reference or tips   [View:www.youtube.com/watch]    also  on my windows install i have notaced 4 Recovery partitions and on some older systems i have seen that if one is missing the OS wont install or work even with a new drive it will fail , check into the Partitions and see if they are deleted will a clean new OS work on that computer ,, an easy way to check is to put a new or used drive in it to test the situation , as for OM it should be Origonal Manufacturer i would just do the Recovery option  Provided to do the clean install
Dell laptop Inspiron 15 - 3542 I purchased the laptop last July. It has windows 8.1 pre-installed. My understanding is that this is OEM. There were no media supplied with the laptop. I have read part of some of the guides at This site I want to run DBAN to securely wipe the HDD, then install a FULL Windows 8.1 Have ordered the media for this , it is part number 634-10276 - "KIT - Deployment Solution Media Kit - OM Kit". I don't know what the 'OM' stands for. Is the Windows 8.1 software on this media a FULL version/release ? I don't want OEM anymore , as I need to reinstall a fresh Win 8.1 
Installing a FULL Windows 8.1 ?