After initially installing spybot as recommeneded by Yahoo, I ran the registry back up and the program froze. I re-started and at the point of scanning for bots it slowed down to a complete crawl and ran cpu usage up to 100% at the point of " Running Bot Check 66930/66930 Internet Explorer Administrator Bookmark" I finally had to close the program via task manager which showed the program to be "not responding" This happened 3 times before I gave up on it. Zone Alarm Spyware software is just as up to date and it doesn't have this problem. Seems someone is writing software which uses too many resources to try and run correctly.