My computer "cannot locate operating system"...all I is a black screen and that message!!I tried fdisk..fdisk/mbr...It cannot locate system on "c"..When I use the recovery disk that came with the computer..The first screen comes up,to agree with microsofts terms....I press O.K..The second screen says "Error Non-Dos Partitions on Drive...Must Delete".....How do I find them??..How do I Know What They Are!!??.And How do I Delete Them??...Any Help Will Be Appreciated.....Thanks....Steve