Barrow striker Walker has netted 21 times this season
Jason Walker's first-half brace was enough for Barrow to seal a league double over Kidderminster Harriers.
The hosts went ahead when Paul Edwards put into his own net as he tried to intercept Chris McPhee's cross.
Walker then levelled for Barrow from close range after keeper Jasbir Singh saved his first shot at goal.
The striker then scored what proved to be the winner after a mistake from Singh allowed him to head home from deep inside the area.
Harriers failed to make their possession count with McPhee seeing several attempts on goal thwarted by Stuart Tomlinson while Brian Smikle hit an upright with a header from close range.
Barrow had a chance to extend their lead but Singh produced a fine save to prevent Andy Bond from finding the net.
Kidderminster manager Steve Burr told BBC Hereford & Worcester: "It was pretty much the same story again tonight in that I thought that we played very well in the first half.
"We got off to a good start, but then we lost possession and they got an equaliser.
"As for the second goal, well, that was disappointing to say the least."
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