you should start a new thread. WIndows does not really have a function to delete itself. It is more likely that it would be a hardware configuration error. IE the drive is not being recognized, the partition is not being recognized or the drive letters have been reassigned.
as for your other questions a optical disk refers to a DVD with windows on it.
normally for this problem, you boot into bios and check to see if your date and time are still correctly set. Often it they are wrong, it will be because of a battery backup failure which can change the BIOS sata controller setting back to defaults.
If the default is not the correct mode then the controller will not read the drive correctly and it will appear that the entire windows OS has disapeared. To get it back in this case you would just change the BIOS entry for the sata to be one of the other modes (most likely AHCI would be the correct setting but it depends on the year your system was built)
if that works you would be able to boot but each time you powered off the system you would have to make the BIOS change until you replace the battery backup on the motherboard.
minelli :
itmoba :
In theory, there should be a recovery partition. However, from what I gather Norman is saying that this partition is gone as well.
I've already said that you can download Windows directly from Microsoft. What is there not to understand? If you don't have an optical media drive, you'll need to download the ISO from another computer. If you don't have a USB drive that's capable, then, you'll have to buy one. Sorry, but there're few options available to you.
Mr. Itmoba,
,thank you for your free advice. I got it the first time I read the complain and recognized it right away because today I am going thru the same thing. Three days ago my windows ten deleted itself from my desk top. I still have it on my laptop and it's fine today but so was my desk top until now. I will not pretend to know much and I see you mentioned that the ISO can be downloaded from another computer. can I use my laptop to help my desk top Sir? I do not have a windows ten disk or a disk for my original windows seven. I do not understand what an optical media drive is. Can you please explain in I am not ashamed to say in simple terms?. I also have to get a USB drive, can you explain pls. Please forgive the questions but I am truly lost as what to do and I can't do my homework. Bottom line, can I do the same that Microsoft can do to help this if I get a window ten disk? The OS is gone so of course you know I can't go any further than the screen that says, " no OS found, delete drivers not used, press ctrl, alt delete for restart, NOTHING, it goes back to the blk screen. I unplug, plug...NADA. goes right back to blk. screen. Now Microsoft is saying I have to pay for a disk or download. How dare they. This is their responsibility. They knew when they offered this windows ten free that it had loads of bullshit glitches, but we did not !!!. Then again in my country these multi billion dollar companies do not get so filthy rich by being honest and good natured. Sir, can I download on my hard drive or disk windows ten from my laptop and put it in my desk top cd player? Would it accept it? I will appreciate any help or advice or opinion you can spare. If anything I hope you get my message because I just noticed your comment is from six months ago. And thank you if you read mine.....Sincerely, Neena