Hi csbell1030,
Welcome to Sony Community!
We're sad to hear about this. I strongly suggest that you back up all your files before it's too late. You may also want to create your own Recovery Disc. By the way, the SVE141D11lL is the chassis number of the laptop. Please verify themodel name.
Below are the steps to troubleshoot the issue
For the Error: Operating system not found or missing operating system.
https://us.en.kb.sony.com/app/answers/detail/a_id/44854/p/4890 3,49902,71247,71254/c/65,66/kw/operating%20system%20not%20found
Note: please make sure to update the BIOS.
Regards,
Jen
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