after deleting oem partition on Dell computer,using Diskpart and "delete partition override handle".The space on the hard drive has now diappeared,it can't be seen by or is not seen by Diskpart,Bios or windows management consul.Any ideas how I can access this space and use it

are you fluent in diskpart ,as im am not' but have used it to created a bootable thumb drive following a utube video of course .
this link shows all the diskpart commands ,my opinion is you need to use diskpart to now create a new partition
http://technet.microsoft.com/en-us/library/cc754498%28WS.10%29.aspx

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