WDFME.exe RAM hog

For What its worth…   Been using WDSmartware for a a year or so.    It kept my machine busy at times before.   I just updated it yesterday to version 1.5.1.6.    Its killing my machine now.   (win XP)    It seemed like it took for ever to finish the first backup with the new version.   After a reboot today, its been doing something to consume most of the resources for 4 hours.   I have selected backup when machine is idle.    Looks like it is finished now.   Got to go and do something before it fires up again!