cant install avast home, vanilla install of vista x64

I have a clean install of vista x64 running inside a virualbox. Both the host and guest are running vista x64, the guest system is patched thru march 09 (lab system). Its bone stock with all default options on. I have tried a number of ways with the same error that seems to say nothing about why it failed (more verbose errors would be helpful). Very first run of the program I got the “there was an error while completing the setup process”, I have run the uninstaller inside safe mode. It says it uninstall things but it seems to say that no matter what, might be worth changing that in future versions. Vista is running UAC and running as admin changes nothing (UAC prompts do come up when I run primary installer (300k). I have run with both auto proxy and direct connection. Same error, for kicks I tried to run the downloaded setupeng.exe but nothing happens. Dump below is from my final try with direct connection. I downloaded the primary installer with IE 7.0.6001. No other programs have been install other than guest systems. System hardware is higher end and modern, let me know if you need specs.

11.07.2009 15:58:28 general: Started: 11.07.2009, 15:58:28
11.07.2009 15:58:28 system: Operating system: Windows Vista ver 6.0, build 6001, sp 1.0 [Service Pack 1] AMD64
11.07.2009 15:58:28 system: Memory: 33% load. Phys:1019136/1534752K free, Page:2725964/3328644K free, Virt:2025108/2097024K free
11.07.2009 15:58:28 system: Computer WinName: VISTA64_SANDBOX
11.07.2009 15:58:28 system: Windows Net User: vista64_sandbox\bob
11.07.2009 15:58:28 general: Old version: ffffffff (-1)
11.07.2009 15:58:28 system: Using temp: C:\Users\bob\AppData\Local\Temp_av_inet.tm~a02596 (6641M free)
11.07.2009 15:58:28 internet: SYNCER: Type: use IE settings
11.07.2009 15:58:28 internet: SYNCER: Auth: another authentication, use WinInet
11.07.2009 15:58:28 general: Install check: Program folder does NOT exist in registry
11.07.2009 15:58:28 general: SGW32P::CheckIfInstalled set m_bAlreadyInstalled to 0
11.07.2009 15:58:33 internet: SYNCER: Type: no proxy
11.07.2009 15:58:33 internet: SYNCER: Auth: no authentication
11.07.2009 15:58:33 general: progress thread start
11.07.2009 15:58:33 general: Destination: C:\Users\bob\AppData\Local\Temp_av_inet.tm~a02596
11.07.2009 15:58:33 general: Starting download: http://www.avast.com/go.php?verb=get-avast-home&type=cnet&langid=eng
11.07.2009 15:58:33 internet: HttpGetWinsock(http://www.avast.com/go.php?verb=get-avast-home&type=cnet&langid=eng)
11.07.2009 15:58:33 internet: HttpGetWinsock(http://files.avast.com/iavs4pro/setupeng.exe)
11.07.2009 15:58:33 internet: HttpGetWinsock(http://download660.avast.com/iavs4pro/setupeng.exe)
11.07.2009 16:00:03 general: Download finished from server download660.avast.com, result: 0x00000000, server response: 200
11.07.2009 16:00:04 general: C:\Users\bob\AppData\Local\Temp_av_inet.tm~a02596\setupeng.exe, size: 36182432. md5: 3D46733141CDF94F7C4CE09CCB4FA576, computemd5 returned 0x00000000, sig: 89386B3C1121B3D2C484D9C308A65318D76DBDEF6B138871AA4A48A094C6AAC11D903771FBFC7E32 returned 0x00000000
11.07.2009 16:00:04 general: Stats download660.avast.com, server response: 536870923
11.07.2009 16:00:04 general: POST result: 0x00000000, server response: 20

Please, check or post the last 300-350 lines of avast log: C:\Program Files\Alwil Software\Avast4\DATA\log\Setup.log