scan freezes - part 2

I posted on this topic a few days ago, but this time I have more information.

The issue was that a scan froze at a certain point, and didn’t finish - the only way I could exit Avast! was to use the Task Manager, or if that didn’t work, switch off the computer. I followed advice given (CCleaner, chkdsk and defrag before trying again) but the problem remains, to a large degree. I hope that the following extra information will allow someone get to the bottom of the problem for me.

I ran each scan (Quick, Standard, and Thorough) twice. The scan froze in the same place both times during the Standard scan, though not at all in either of the Thorough Scans and in only one of the Quick scans. I don’t understand why this should be, but that’s what happened.

I also noted the files that the stalled scans froze at: in all cases of freezing the file being scanned at the time everything froze was E:/Harmony/Documents/francais. E refers to a partition on my HDD, and Harmony is a musical composition program which I haven’t used for months, even years. I assume francais refers to a French language file, which I would certainly have never used - so I don’t think there can be anything amiss here.

For both Standard scans and only one of the Quick scans, freezing occurred when 94% of the scan had completed.

I also noted the following from the relevant report files in the Avast4 folder:

For the Standard scans (both of them) there was a long list of files unable to be scanned because they were password protected, but at the end there were some which mentioned a corrupted file, namely these three:

C:\WINDOWS\SoftwareDistribution\Download\f0ea9c6453e24bb53d66672cfca8db17\BITD.tmp\OUTLFLTR.msp\OUTLFLTR.DAT [E] CAB archive is corrupted. (42127)

C:\WINDOWS\SoftwareDistribution\Download\f0ea9c6453e24bb53d66672cfca8db17\BITD.tmp\OUTLFLTR.msp\OUTLFLTR.DLL [E] CAB archive is corrupted. (42127)

C:\WINDOWS\SoftwareDistribution\Download\f0ea9c6453e24bb53d66672cfca8db17\BITD.tmp\OUTLFLTR.msp [E] CAB archive is corrupted. (42127)

For the one Quick Scan which froze, the last 13 files in the report said anything about corrupted files, and they were:

Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\01_Tables [E] OLE archive is corrupted. (42145)

C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\QuickTime.cab\QTOLibrary.dll [E] CAB archive is corrupted. (42127)

C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\QuickTime.cab\QTUIPanelControl.dll [E] CAB archive is corrupted. (42127)

C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\QuickTime.cab\QuickTimePlayer.exe [E] CAB archive is corrupted. (42127)

C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\QuickTime.cab\Sample.mov [E] CAB archive is corrupted. (42127)

C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\QuickTime.cab\PictureViewer.exe [E] CAB archive is corrupted. (42127)

C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\QuickTime.cab\Sample.qtif [E] CAB archive is corrupted. (42127)

C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\QuickTime.cab\QTPlugin.ocx [E] CAB archive is corrupted. (42127)

C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\QuickTime.cab\QTTask.exe [E] CAB archive is corrupted. (42127)

C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\QuickTime.cab\PanelHelperBase.qpa [E] CAB archive is corrupted. (42127)

C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\QuickTime.cab\PropertyPanels.plist [E] CAB archive is corrupted. (42127)

C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\QuickTime.cab\annoanno.pdef [E] CAB archive is corrupted. (42127)

C:\Documents and Settings\NetworkService\Local Settings\Temporary Internet Files\Content.IE5\K3SV6DWI\QuickTime[1].msi\QuickTime.cab [E] OLE archive is corrupted. (42145)

Any help much appreciated! I would like to know a Quick or Standard scan will work properly when I run one. And I hate an unsolved problem!

How exactly does it freeze? Does it happen always approximately at the same place/folder of the scan?
Do you see a hard disk activity (when it freezes)? Is only the program frozen, or the whole computer (possibly with mouse cursor)?

You can go to the program settings and turn on the creation of the report file (with “OK files” to be included as well in the report). This way, you can find out where the scan really stopped (it’s going to be close to the end of the report).

After avast! disappears, check the end of the report file - the “troublesome” file is likely to be close to the end (close in the sense that this particular file will probably not be written in the report, buavast can’t scan files that are password protected, it doesn’t know the password.
There are many legitimate reasons why a file was password protected. For instance, Lavasoft Ad-aware and SpyBot store their data in a password-protected ZIP archives (to prevent other similar tools from messing up with them). It’s really nothing to worry about - it’s normal.

Also, the packaging of the file could have some error, or use a non-standard pattern… Don’t worry about archive corrupted.

Maybe there is a very heavy file try to find it and delete it if it is like I just said