Repair a laptop without a CD?

I have a problem. And while spanking my sister's laptop. When starting it comes:

"Windows Boot Manager

Error while starting Windows. The cause may be a recent hardware or software change. To correct the problem:

Insert the Windows CD / DVD and restart the computer.
Select the language settings, and then click Next
Click Repair Computer.

If you do not have this disk, contact the computer administrator or the computer manufacturer

Status: 0xc000000f

Info: Error during start selection. Access to a required device is not possible. "

Can you please explain to me if and how I can repair this laptop without a Windows CD?

Not at all, if you ask so.

But you can download the CD or DVD from Microsoft.

Buy Windows Vista DVD.

I would test Windows 10 with 2GB of RAM

Windows 10 32bit.

Link please

Possibility 0

When the PC boots press F6 or F8 and see if you come in safe mode. (sometimes works wonders)

Possibility Number 1

Click fix computer and hope he can do it (he usually does not)

possibility 2

Windows XXX version whatever you have download and with the 30-day trial version hope that if you insert it as a DVD that he repaired the broken file with "Insert the Windows CD / DVD and restart the computer" (works sometimes)

Option 3

Create a boot stick with z.b. https://www.heise.de/...25926.html

so.

Save the important data and then install a new datum. (always works except the bios is protected or the hard disk is encrypted)

Option 4

Plug in via USB external, change boot order and boot from the boot and then do the necessary steps until the problem is solved (works to 99% but only if someone does know)

Option 5

Service engineer
(usually expensive but solves 90% of the problem if the data is important)

Possibility 6

Replace the device

Hope I could help

Um… Microsoft.com?

More at microsoft.com/de-de/software-download

Google broken?

I'm waiting for your link to Windows Vista, take your time.

And how do you know that? There was never talk of Vista… Be arrogant, but ask for help, great stuff… -.- '

Well, that's in the subject, as an expert, no matter

Almost nobody looks at the…

Anyway, if you do not have Vista Imgae, it will probably be impossible. - Especially since you do not know exactly WHERE the problem lies, a live system would not help.