Urgent : problem to start Lenovo laptop

[markjhun]

Hello,
i have problem to start the laptop it shows {#an operating system was not found. try disconnecting any drives that don't contain an operating system.
press ctrl+alt+del to restart.}

please guys need help

 

[Trouble]

First it would help to know something about the exact laptop involved.
Model name, model number complete with part number.
What happened to produce the problem?
After upgrading to Windows 10? How long after?
After a Windows 10 Update? How long after?
Is this an upgrade? IF so from what? To what?
OR
Is this a clean install?

 

[Saltgrass]

The more info we have the better, but for now, did you disconnect any extra drives so only the one bootable device is available?

We have seen several posts concerning this same problem. I do not yet know what is responsible but some folks seem to develop the problem after an update. Why an update would make a difference, I do not know.