MC CS5.5 - Exit Code 6 but it still works ...

Question

I've had three attempts to install my Master Collection CS5.5 upgrade now - Windows 7 SP1.  The first time I realised I left Kaspersky AV running - MC installed but I got an Exit Code 6, uninstalled, then reinstalled with KAV paused - Exit Code 6 again.  Then I tried installing in the minimised state - same again though, installed but got an Exit Code 6.
- 0 fatal error(s), 91 error(s), 8 warning(s)
One error seems to relate to the Flash Player plugin, but the vast majority are Adobe Encore CS5.1 Library 5.1.0.0  and are 'ERROR: DS012: LocalizeFile:Localized string not found for locale 'en_GB'  and then different bracketed numbers after each.
I have launched and run each application ... not used it as such, but launched and messed about a bit ... superficially they seem to be working.
So the question is, do I ignore these errors and keep uninstalling and reinstalling with whatever things disabled, or do I take the view that if it looks like it's working, it probably is?
This is a new install of Win 7 on a new drive, and other than Lightwave, the MC is the only thing I have installed ... well, and Kasperksy AV 2012.
I've read some other threads and articles on this, and the Adobe help docs from as recently as June this year, so clearly there are problems.
I'm posting the log file, but omitting most of the locale 'en_GB' errors to reduce the length of it.
I'm also uncertain if the log is reporting that the Windows Installer is not working properly - Error 1722 - though again that appears to be the Flash Player plugin problem.
Thanks for any help.
Julian.
Exit Code: 6
-------------------------------------- Summary --------------------------------------
- 0 fatal error(s), 91 error(s), 8 warning(s)
----------- Payload: {CFA46C39-C539-4BE9-9364-495003C714AD} Adobe SwitchBoard 2.0 2.0.0.0 -----------
WARNING: DF029: ARKServiceControl::StartService: Service not started/stopped SwitchBoard. Current State: 0 Exit Code: 0 Service Specific Exit Code: 0(Seq 1)
----------- Payload: {2EE4F060-CEE6-4002-AA8B-91B791541767} Pixel Bender Toolkit 2.6.0.0 -----------
WARNING: DF035: CreateAlias:Icon file does not exist at C:\Program Files (x86)\Adobe\Adobe Utilities - CS5.5\Pixel Bender Toolkit 2.6\windows\pb_app.icofile:\\\C:\PIXELB~1\source\winwood\Staging    0X1.8E9110P-1020rea\windows\pb_app.ico42178f80493091e8e552c84a2897e9da68fce32_32_f8049309 1e8e552c84a2897e9da68fce for icon C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Adobe Master Collection CS5.5\Adobe Pixel Bender Toolkit 2.6.lnk with target C:\Program Files (x86)\Adobe\Adobe Utilities - CS5.5\Pixel Bender Toolkit 2.6\Pixel Bender Toolkit.exe(Seq 89)
----------- Payload: {43A1C48E-3E50-410e-951C-E17A66BBF824} Adobe Flash Player 10 Plugin 10.0.0.0 -----------
ERROR: Error 1722.There is a problem with this Windows Installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor. Action NewCustomAction1, location: C:\Users\SirJ\AppData\Local\Temp\InstallPlugin.exe, command: -install plugin -msi
ERROR: Install MSI payload failed with error: 1603 - Fatal error during installation.
MSI Error message: Error 1722.There is a problem with this Windows Installer package. A program run as part of the setup did not finish as expected. Contact your support personnel or package vendor. Action NewCustomAction1, location: C:\Users\SirJ\AppData\Local\Temp\InstallPlugin.exe, command: -install plugin -msi
----------- Payload: {F194231A-13B9-45B9-9699-1B9AC6500263} Adobe Encore CS5.1 Library 5.1.0.0 -----------
ERROR: DS012: LocalizeFile:Localized string not found for locale 'en_GB'(Seq 2710)
ERROR: DS012: LocalizeFile:Localized string not found for locale 'en_GB'(Seq 2726)
----------- Payload: {47CE893F-A0FF-4094-AA16-5209AEA7C7E0} Firefox Plugin CS5.1 6.1.0.0 -----------
WARNING: DF012: File/Folder does not exist at D:\Adobe CS5_5\payloads\AdobeContribute6.1-FFPlugin\OEM(Seq 32)
----------- Payload: {208DE3D5-541C-41B0-8595-7A608A6E4306} IE Plugin CS5.1 6.1.0.0 -----------
WARNING: DF012: File/Folder does not exist at D:\Adobe CS5_5\payloads\AdobeContribute6.1-IEPlugin\OEM(Seq 26)
----------- Payload: {4A4F91EA-5951-4C5C-B911-027D802817EB} Office Plugin CS5.1 6.1.0.0 -----------
WARNING: DF012: File/Folder does not exist at D:\Adobe CS5_5\payloads\AdobeContribute6.1-OfficePlugin\OEM(Seq 34)
----------- Payload: {DD309051-FACF-4A5E-87F1-C57154BB3DE8} Adobe Contribute CS5.1 6.1.0.0 -----------
WARNING: DF012: File/Folder does not exist at D:\Adobe CS5_5\payloads\AdobeContribute6.1-mul\OEM(Seq 8283)
----------- Payload: {8DADF070-FE60-4899-8EF0-4242E7702F7D} Adobe Fireworks CS5.1 11.1.0.0 -----------
WARNING: DF012: File/Folder does not exist at D:\Adobe CS5_5\payloads\AdobeFireworks11.1.0All\OEM(Seq 1215)
----------- Payload: {5BDE0A1B-35BF-4224-A54F-73786EECDFC1} Adobe Fireworks CS5.1_AdobeFireworks11.1.0en_GBLanguagePack 11.1.0.0 -----------
WARNING: DF012: File/Folder does not exist at D:\Adobe CS5_5\payloads\AdobeFireworks11.1.0en_GBLanguagePack\OEM(Seq 74)
ERROR: DW050: The following payload errors were found during install:
ERROR: DW050:  - Adobe Flash Player 10 Plugin: Install failed

Answer 1

Reading this again, and Todd Kopriva's final response in this thread:
http://forums.adobe.com/message/3639544
It seems that the Flash Player being preinstalled is the cause of all these errors, in this case, but that they are all actually erroneous ... is that correct?
Because if so, I'm not seeing that on the main FAQ for installer issues for the Creative Suites, although in fairness, there are doubtless many, many other errors that are genuine.
Julian.