Introduction Registry Cleaners have been discussed many times at Wilders and it's not my intention to discuss Registry Cleaners all over again. These discussions taught me, which Registry Cleaners are the better ones. These discussions didn't tell me which Registry Cleaner - is the very best, because each member has his own opinion on that. - is the SAFEST one, bacause each member has his own opinion on that too. So I did a crazy test on my own to figure out which Registry Cleaner could be the SAFEST one, which is IMO the most important property of a Registry Cleaner. Once winXPproSP2 is installed OFF-LINE, your harddisk contains nothing but winXPproSP2-registries and MS Application-registries and all these registries are supposed to be VALID without any exception, which means that each Registry Cleaner in theory won't report any registry that needs to be removed. Experts will most probably tell me, that some registries can be removed safely and I have no doubts they are right, but that doesn't solve anything for less-knowledgeable users. Less-knowledgeable users and I prefer to think like one, don't know anything about registries and they don't see the difference between a registry, that can be removed safely and a registry, that cannot be removed. So any reported registry by a Registry Cleaner in this test is a FALSE POSITIVE for less-knowledgeable users. Registry Cleaner Test The following Registry Cleaners in alphabetic order were included in this test. I used most well-known Registry Cleaners and a few newcomers in my test, that were mentioned at Wilders. Ace Utilities v3.0 (Acelogix) - $29.95 Amust Registry Cleaner v2.1 (AMUST Software) – $29.99 CCleaner v1.28.277 (CCleaner) - Freeware EasyCleaner v18.104.22.1680 (ToniArts) - Freeware Eusing Free Registry Cleaner v1.0 (Eusing Software) – Freeware JV16 PowerTools 2006 v22.214.171.1246 (MaceCraft Software) - $29.95 Registry Healer v4.4.1 (KsL Software) - Registry Mechanic v5.2 (PC Tools Software) - $29.95 RegSeeker v1.45.0505 (Hover Inc.) - Freeware RegSupreme v126.96.36.199 (Macecraft Software) - $12.95 RegSupreme Pro v188.8.131.52 (Macecraft Software) - $16.95 RegVac v4.02 (Super Win Software) – $29.95 TuneUp Utilities 2006 (TuneUp Software) - $39.99 (Registry Medic isn't included, because the download page was dead.) Registry Cleaner Test Results If there was an expert mode, I took the normal mode, like less-knowledgeable users would do. The number behind each Registry Cleaner = number of registries, that were reported for removal. The most aggressive one is #13. 01. Amust Registry Cleaner...... : 11 02. EasyCleaner................. : 22 03. CCleaner.................... : 23 04. Registry Mechanic........... : 28 05. Ace Utilities............... : 36 06. JV16 PowerTools 2006........ : 50 07. RegSupreme.................. : 64 08. RegSupreme Pro.............. : 64 09. TuneUp Utilities 2006....... : 109 10. Eusing Free Registry Cleaner : 124 11. RegVac Registry Cleaner..... : 139 12. Registry Healer............. : 185 13. RegSeeker................... : 208 Don't take this test too seriously. It's just an indication. My advice for less-knowledgeable users is still : use any of these Registry Cleaners VERY CAREFULLY or not at all. I'm going to use one of the freewares in combination with "Total Uninstall v3.61" to remove the leftovers after running TU.