Comparison of 176 Registry Cleaner Products: File Reference Analysis Accuracy

These tests were performed in October 2010

Registry Cleaner File Reference Analysis Accuracy

A very common feature of registry cleaners is a “file reference analyzer.” Basically, a file reference analyzer finds incorrect file references within the Windows registry and lists them as errors.

Analyzing pseudo-random string data in an effort to find file references is a rather complicated procedure. Therefore, registry cleaners can sometimes incorrectly list valid file references as errors; these are called false positives.

This test was made by first adding 1,000 computer-generated “broken file reference” types of errors to the registry, as well as another 1,000 valid file references. All the data was added to the 64-bit view of the registry.

An example of a “broken file reference” types of error is the file reference “C:\fake\application.exe.” This registry entry would be considered an error because the file reference is not valid: the directory “C:\fake\” does not exist.

An example of an added valid file reference is “C:\directory\file.exe -foobar”. The file reference is valid: the directory “C:\Directory\” does exist and inside the directory a file called “file.exe” exists. The reason why this piece of data could be picked by a registry cleaner as a false positive would be if it didn’t properly analyze that “-foobar” is not a part of the filename.

Product Total Errors Found Test Errors Found False Positives Comments
1-ACT Registry Cleaner 2006 219 n/a n/a Shows only 3 first errors, impossible to test
1 Click Fixer Plus 436 138 140
1-Click PC Fix 210 0 0
360 Amigo System Speedup 261 0 0
Abexo Registry Cleaner 210 0 0
Abyssal Registry Cleaner 954 600 0
Ace Utilities 1256 1086 112
ACleaner 93 0 0
Advanced PC Optimizer 1109 251 309
Advanced Registry Optimizer 164 14 0
Advanced System Optimizer 26 0 0
Advanced Vista Optimizer 2009 270 187 0
All in One Cleaner 119 n/a n/a Does not show full registry data, impossible to test
AML Free Registry Cleaner 1337 870 382
AMUST Registry Cleaner 32 0 0
Ashampoo winoptimizer 55 0 0
Auslogics Registry Cleaner 36 0 0
Bug Doctor 93 85 0
CCleaner 17 0 0
Chily Registry Cleaner 615 0 0
CleanMyPC Registry Cleaner 131 0 0
COMODO System Cleaner 99 0 0
CyberDefender Registry Cleaner 315 97 0
Dedaulus System Cleaner 41 0 0
Desktop Maestro 239 125 29
Digeus Registry Cleaner 1042 412 58
EasyCleaner 204 0 0
EnhanceMyVista Pro (censored) (censored) (censored) (censored)
Eusing Free Registry Cleaner 99 0 0
Ez Registry Cleaner 917 0 0
Fixio PC Cleaner 2010 231 0 0
Fix-it utilities 10 Pro 114 0 0
Free Professional Registry Doctor 40 0 0
Free Registry Fix 5.0 1221 0 0
Free Window Registry Repair 554 0 0
Frontline RegCleaner 673 4 0
Glarysoft Registry Repair 954 535 371
jv16 PowerTools 2009 942 804 0
jv16 PowerTools 2010 1208 947 0
Lavasoft Registry Tuner 43 0 0
Little Registry Cleaner 44 0 0
Max PC 248 187 0
Max Registry Cleaner 381 112 0
MCS Registry Cleaner 2008 3108 1282 303
Migo Registry Repair 1465 0 0
Mr Fix Registry Cleaner 18 0 0
MV RegClean 5 18 0 0
My Bug Free PC 2320 1463 343
nCleaner 110 0 0
NetGate Registry Cleaner 240 0 0
Norton Utilities 282 107 27
OK Registry Cleaner 1271 650 54
PAL Registry Cleaner Optimizer 67 0 0
ParetoLogic PC Health Advisor 28 0 0
PC Bug Cleaner 6241 0 0
PC Error Cleaner 866 448 356
PC Pitstop Optimize 55 0 0
PC-Kitchen Registry Cleaner 70 0 0
PC Doc Pro 55 4 0
PC Registry Cleaner 1094 0 0
PCSleek Free Error Cleaner 452 0 0
PerfectOptimizer n/a n/a n/a Does not finish
PerfectSpeed PC Optimizer 76 0 0
Pimasoft Registry Cleaner n/a n/a n/a Does not run properly
Pointstone Registry Cleaner 78 0 0
Power Registry Cleaner 324 0 0
Privacy and Registry Cleaner 145 0 0
PowerTools Lite 452 414 0
QCleaner 977 0 0
Quick Registry Cleaner 615 13 2
Quicksys RegCleaner 2009 313 0 0
QuuSoft Registry Cleaner 1293 373 30
Reg Organizer 754 307 0
RegAce 753 4 0
RegAdvance 931 0 0
RegClean Pro 573 524 0
RegCleaner 50 31 9
RegCross Registry Cleaner 207 0 0
RegCure 37 0 0
Reg Fix Mantra 222 154 61
RegGenie 939 45 98
RegiGuard 82 0 0
RegInOut 463 0 0
Registry Clean Master 111190 0 0
Registry Cleaner 4 617 0 0
Registry Cleaner And Fixer 277 9 0
Registry Cleaner Free 51 0 0
Registry Distiller 725 0 0
Registry Help 1234 723 143
Registry Mechanic 344 130 31
Registry Repair Pro 350 250 0
Registry Speedup 846 611 78
Registry Clean Expert 179 0 0
Registry Life 356 149 0
Registry Repair Wizard 180 0 0
Registry Convoy 234 0 0
Registry Defense 1179 0 0
Registry Easy 1024 900 42
Registry Genius 1287 574 48
Registry Kit 333 56 51
Registry Medic 2008 212 0 0
Registry Medic 5 191 0 0
Registry Reviver 700 1 113
Registry Rid 234 0 0
Registry Sweeper Pro 243 0 0
Registry Winner 286 0 0
Registry Fix It 126 0 0
RegRepair 2000 691 19 0
RegScrubVistaXP 918 0 0
RegSeeker 3940 13 5
RegTidy2009 234 0 0
RegTool 378 0 0
RegTweaker 1073 0 0
RegUtility 2758 0 0
RegVac Registry Cleaner (censored) (censored) (censored) (censored)
Regwork 483 7 0
RegZooka 467 0 0
Riverbit Registry Cleaner 332 0 0
Security Stronghold Registry Cleaner 541 0 0
Smart PC 923 302 142
SS Registry Fixer 137 0 0
Super Rabbit Registry Optimizer 150 0 0
Super Utilities Professional 193 0 0
System Mechanic 214 n/a n/a Does not show full registry data
System Cleaner 478 195 0
System Mechanic Pro 225 n/a n/a Does not show full registry data
Tipard Registry Cleaner 371 0 0
TuneUp Utilities 2010 (censored) (censored) (censored) (censored)
TweakNow PowerPack 2010 352 0 0
TweakNow RegCleaner 325 0 0
Ultimate Registry Cleaner 84 0 0
Uniblue Registry Booster 2010 106 0 0
Vista TuneUpSuite 1944 466 64
Vit Registry Fix Free Edition 1273 280 83
WinASO Registry Optimizer 492 0 0
WinCleaner OneClick Professional Clean (censored) (censored) (censored) (censored)
Windows7 Manager (x64) 771 173 36
Windsty Registry Cleaner 1845 333 65
Winferno Registry Power Cleaner 1896 0 0
WinMend Registry Cleaner 811 12 1
WinTools.net Professional 681 0 0
WinUtilities 267 4 0
Wise Registry Cleaner Pro 112 1 0
Wondershare Registry Optimizer 473 0 0
WINner Tweak Registry Cleaner XP 6 0 0
WyvernWorks Registry Fix-Up 2004 674 246 192
XP Repair Pro 849 574 9
Your Cleaner 647 0 0
Your Free Registry Cleaner 93 0 0

Notes: The total number of errors is given only as a reference; it cannot be used to make any comparison between products because not all the results were verified. The total number of errors can therefore contain duplicate data and false positives. Most products did not contain any filtering or search feature, therefore the number of results found by many products had to be counted manually, and therefore there may be minor errors in the results.

Color Codes: Green background is used for all products which found at least 50% (i.e. 500) of the test errors and none of the false positives. Red background is used for all products which found false positives. These Color Codes relate to the test results and to the safety and performance of these products.