I am also having this problem.
I have been using Defraggler for quite some time now, over many versions, and never had a problem with it. This just started last night, and there were no major windows update or anything to prompt this. I tried reinstalling defraggler, but that did not help.
Attached is the debug file.
Here is what I believe to be the relevant part of the debug file:
2009-05-10] [21:42:39.139] 00f70 1 CVolumeOperationScheduler::ExecuteQueuedMethods#201 ---------------- Long task started ----------------[2009-05-10] [21:42:39.139] 00f70 1 CAnalysis::AnalyzeVolume#19 Entering CAnalysis::AnalyzeVolume[2009-05-10] [21:42:39.139] 00f70 1 CAnalysis::AnalyzeVolume#27 Analysis of volume C: started[2009-05-10] [21:42:39.139] 00f70 1 Wow64FsRedirectorDisabler::Acquire#50 Wow64DisableWow64FsRedirection failed with error code: 0x80070001.[2009-05-10] [21:42:39.140] 00f70 1 CAnalysis::AnalyzeVolume#62 Volume C: flushed.[2009-05-10] [21:42:39.334] 00f70 1 CVolume::ReloadMap#247 00 00 00 00 00 00 00 00 55 7f a2 04 00 00 00 00 ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff ff [2009-05-10] [21:42:39.334] 00f70 1 CVolume::ReloadMap#260 MftZone: <12553632, 12604864).[2009-05-10] [21:42:39.344] 00f70 1 CAnalysis::AnalyzeVolume#78 Initialization finished in 0.204 seconds.[2009-05-10] [21:42:39.344] 00f70 1 CNtfs::ReadFileRange#65 SetFilePointerEx failed with error code: 0x00000057 (hVolume: 0x000001bc, offset: 1229026946693312040)[2009-05-10] [21:42:39.344] 00f70 1 CNtfs::LoadMft#32 ReadSector failed with error code 87.[2009-05-10] [21:42:39.344] 00f70 1 CAnalysis::AnalyzeVolume#89 Analysis of volume C: finished in 0.000 seconds.[2009-05-10] [21:42:39.344] 00f70 1 Wow64FsRedirectorDisabler::Release#59 Wow64RevertWow64FsRedirection skipped.[2009-05-10] [21:42:39.344] 00f70 1 CAnalysis::AnalyzeVolume#19 Leaving CAnalysis::AnalyzeVolume[2009-05-10] [21:42:39.344] 00f70 1 CVolumeOperationScheduler::ExecuteQueuedMethods#232 ---------------- Long task finished (time: 0.205s, return code: 0x00000000) ----------------
I run Windows Vista home premium 32-bit on a toshiba laptop.
Thank you for your help.
EDIT: Strangely enough, when I go to file->defrag folder and select the C drive, it works just fine.
Defraggler.exe._1_9_138__2009_05_10_21_42_.txt
Defraggler.exe._1_9_138__2009_05_10_21_42_.txt