All VBox tools fail: Code E_NOINTERFACE on Win7 x64

[62mkv]

Hello everyone !

When I install VirtualBox-4.2.14-86644-Win.exe on Win7 x64, installation goes smoothly - none errors or warnings are logged in installation log (I've tried "-l" switch).

The resulting folder "C:\Program Files\Oracle\VirtualBox" contains 124 698 226 bytes in 49 files (and 5 subfolders). But I cannot run ANY of the tools installed: VirtualBox.exe, VBoxManage.exe - all result in the same error like this:
VBoxManage.exe: error: Failed to create the VirtualBox object!
VBoxManage.exe: error: Code E_NOINTERFACE (0x80004002) - No such interface supported (extended info not available)
VBoxManage.exe: error: Most likely, the VirtualBox COM server is not running or failed to start

VBoxSVC.log contains the same items all the time:
VirtualBox COM Server 4.2.14 r86644 win.amd64 (Jun 21 2013 15:56:05) release log
00:00:00.015000 main Log opened 2013-07-01T04:35:22.019328300Z
00:00:00.015000 main OS Product: Windows 7
00:00:00.015000 main OS Release: 6.1.7601
00:00:00.015000 main OS Service Pack: 1
00:00:00.031000 main DMI Product Name: System Product Name
00:00:00.047000 main DMI Product Version: System Version
00:00:00.047000 main Host RAM: 7135MB total, 4963MB available
00:00:00.047000 main Executable: C:\Program Files\Oracle\VirtualBox\VBoxSVC.exe
00:00:00.047000 main Process ID: 5792
00:00:00.047000 main Package type: WINDOWS_64BITS_GENERIC
00:00:00.265000 VDInit finished
00:00:05.273000 Watcher ERROR [COM]: aRC=E_ACCESSDENIED (0x80070005) aIID={3b2f08eb-b810-4715-bee0-bb06b9880ad2} aComponent={VirtualBox} aText={The object is not ready}, preserve=false

Most likely it is an error of COM activation for IVirtualBox interface or one of related TypeLibs. But I cannot manage to solve it neither to find a path to solution.

One of the wiki-articles contains info about debug logging, but it implies that one needs a "debug build" for this. Where could I get it ?

Thanks for any advice.

UPD: that's what registration for IVirtualBox on my Win7 X64 looks like: see attachment ivirtualbox_win7x64.png)

[noteirak]

How do you install Virtualbox exactly? As admin? with or without UAC on?

[62mkv]

My user has administrative privileges. I select "Run as Administrator" when I run installer. I have tried several times, after uninstall and restart, also tried repair... None of that helped to change this behaviour.

Also, I've analyzed installer logs - oddly enough, they are NOT present in %TEMP% folder as msi*.log, only in %TEMP%\VirtualBox as "VirtualBox_install.log" or something like that, and this is deleted after installation, but I've opened it in FAR in F3 (view) mode, and I could read it all and seek in that file - it definitely does NOT contain anything like "error", "warning" or "except[ion]".

[62mkv]

Currently, I would highly appreciate if anyone who has this build of VB installed on a Win 7 x64 machine, could share his listing of "%ProgramFiles%\Oracle\VirtualBox" folder and also a screenshot of OLEView for IVirtualBox interface (like the one I have posted in the first message)