1.Start and stop the windows services

net stop <service name>
net start <service name>
net pause <service name>
net continue <service name>

A full list of the exact services is found in the registry (run regedit.exe) under the HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Services key.

Alternatively, you can perform the stop and start using the name that is showed in the Services Control Panel applet by putting the name in quotes, i.e.

net stop "<service>"
net start "<service>"

2.Display all the Windows services.

net star
sc

3. Query Windows Services status.

net start | find "windwos services nname" 1>nul

if not errorlevel 1 (

echo "windwos services nname" already started.

) else (

echo "windwos services nname" didn‘t started.

)

sc query "windwos services id"| find /C:"STATE" | find /C:"RUNNING" 1>nul

if not errorlevel 1 (

echo "windwos services nname" already started.

) else (

echo "windwos services nname" didn‘t started.

)

4. Search String in a file. Findstr is what you needed.

Use spaces to separate multiple search strings unless the argument is prefixed
with /C.  For example, ‘FINDSTR "hello there" x.y‘ searches for "hello" or
"there" in file x.y.  ‘FINDSTR /C:"hello there" x.y‘ searches for
"hello there" in file x.y.

findstr /c "string" file
if %errorlevel% equ 1 goto notfound
echo found
goto done
:notfound
        echo notfound
        goto done
:done

Or something like: if not found write to file.
        findstr /c "%%P" file.txt  || ( echo %%P >> newfile.txt )

Or something like: if found write to file.
        findstr /c "%%P" file.txt  && ( echo %%P >> newfile.txt )

Or something like:
        findstr /c "%%P" file.txt  && ( echo found ) || ( echo not found )

Useful bat command