sorry for the rather lame title....we have bought an second hand old iMac...the one with the round base and flexi screen and suddenly it freezes on start up - you can enter the password but then it freezes up and has to be switched off at the base, and then the same thing happens again on start up. Don't think we have any cds with it. It was running slow and today we downloaded a cache cleaner ( cache out or something like that). Problem has started since then. Not sure though if that is the cause. It does have a lot of applications on it - would the number of applications slow it down? For now of course - main issue is to how to get it going again. Thanks.