stop R process without closing console?

stop R process without closing console?

I've accidentally initiated a long process in R without saving what I need
from the workspace I'm using in the R console. I would like to stop the
current process without closing the console. But, what always happens in
an intensive process is that the R Console will not respond. I will then
either have to wait or exit out of the console. I am running 64 bit R
2.15.0 and my OS is Windows & 64-bit. Is there some way to kill R
processes outside the R environment and not close the console?