Okay, I realized I needed to make all files and folders visible, and found the files and have them copied to the desktop. I uninstalled LW, and stopped one svchost process. The problem has not reappeared since, but I know it's still there. I do not see any of the common viruses listed in TM. System Idle is near 100%, I assume that's normal. Apparently it's hiding under another - as yet unbeknownst to me - filename.