Hi Douglas, Where a general disk clean up is concerned, you can generally trust Microsoft's version of this. The things to be careful about are, for example, Office Setup files. Even they are not a major problem if they are removed - PROVIDED - you have the original Office CD, because at worst if you have to modify Office, perhaps to add a language dictionary or something of that ilk, it will ask you to insert the Office CD. Bear in mind too, that Registry Cleaners may not clear "Temporary Files", whereas disk cleanups usually do. George. From: access-uk@xxxxxxxxxxxxx [mailto:access-uk@xxxxxxxxxxxxx] On Behalf Of Douglas Harrison Sent: 18 August 2008 10:48 To: access-uk@xxxxxxxxxxxxx Subject: [access-uk] Re: C Cleaner. After writing my reply to Sandra on this topic, I decided to see what the Windows Disk Cleanup would do on the same machine. This refers to a Vista laptop which I have been using for around 8 months. CCleaner offers to remove just over 800 mb, the Windows Disk Cleanup no less than 5 gb! The list for the latter contains many items which, without some research, mean nothing to me. Is it advisable to use a program like CCleaner in addition to the Windows Disk Cleanup? On XP systems I had always run the Disk cleanup regularly and left it at that. But I have been a little cautious with Vista. Any comments would be much appreciaated, Douglas -- Douglas Harrison