There’s always a fine line between tweaking to make something work, and tweaking just because you can. I’m not sure what camp this post belongs in.
BKRunner.exe is the SBS program that wraps around the NTBackup utility. BKRunner generates the email report at the completion of the backup, and is what forces a verify to be performed.
Chris Knight has posted on his blog how to tweak the BKRunner.exe in order to gain some performance improvements when doing backups, as well as how to disable the automatic verify.