My syntax is not correct

[Docfxit]

Something is wrong with my syntax.
I have some code:

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systeminfo | findstr /B "OS Name:" >>"%~dpn0.txt"
systeminfo | findstr /B "OS Version:" >>"%~dpn0.txt"

The output in the txt file shows:

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OS Name:                   Microsoft Windows 10 Pro
OS Version:                10.0.19045 N/A Build 19045
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Standalone Workstation
OS Build Type:             Multiprocessor Free
OS Name:                   Microsoft Windows 10 Pro
OS Version:                10.0.19045 N/A Build 19045
OS Manufacturer:           Microsoft Corporation
OS Configuration:          Standalone Workstation
OS Build Type:             Multiprocessor Free

What I expect it to show is:

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OS Name:                   Microsoft Windows 10 Pro
OS Version:                10.0.19045 N/A Build 19045

What could I be doing wrong?

[ShadowThief]

When you don't use the /C flag, then findstr takes everything in quotes to be a list of things to search for. findstr /B "OS Name:" tells findstr to look for both "OS" and "Name:"

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systeminfo | findstr /B /C:"OS Name:" >>"%~dpn0.txt"
systeminfo | findstr /B /C:"OS Version:" >>"%~dpn0.txt"

[Docfxit]

Thank you very much.

That's great to know.
It's very nice of you to share your knowledge.

[Squashman]

Thank you very much.

That's great to know.
It's very nice of you to share your knowledge.

Straight from the help file for the findstr command.

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Use spaces to separate multiple search strings unless the argument is prefixed
with /C.

I have seen a pattern with some of your questions and it seems like often you do not read the help file for the command you are using.