Fails to install

[Mathwei]

25.12.2009 20:42:46 general: Started: 25.12.2009, 20:42:46
25.12.2009 20:42:46 system: Operating system: WindowsXP ver 5.1, build 2600, sp 3.0 [Service Pack 3]
25.12.2009 20:42:46 system: Memory: 28% load. Phys:1484424/2086884K free, Page:3555080/4024652K free, Virt:2064588/2097024K free
25.12.2009 20:42:46 system: Computer WinName: DEAN
25.12.2009 20:42:46 system: Windows Net User: DEAN\Jean
25.12.2009 20:42:46 general: Old version: ffffffff (-1)
25.12.2009 20:42:46 system: Using temp: C:\DOCUME~1\Jean\LOCALS~1\Temp\_av_inet.tm~a02304 (89940M free)
25.12.2009 20:42:46 internet: SYNCER: Type: use IE settings
25.12.2009 20:42:46 internet: SYNCER: Auth: another authentication, use WinInet
25.12.2009 20:42:46 general: Install check: Program folder does NOT exist in registry
25.12.2009 20:42:46 general: SGW32P::CheckIfInstalled set m_bAlreadyInstalled to 0
25.12.2009 20:43:04 internet: SYNCER: Type: use IE settings
25.12.2009 20:43:04 internet: SYNCER: Auth: another authentication, use WinInet
25.12.2009 20:43:04 general: progress thread start
25.12.2009 20:43:04 general: Destination: C:\DOCUME~1\Jean\LOCALS~1\Temp\_av_inet.tm~a02304
25.12.2009 20:43:04 general: Starting download: http://www.avast.com/go.php?verb=get-avast-home&type=cnet&langid=eng
25.12.2009 20:43:04 internet: ERROR:HttpGetWininet, catch returned 0x00002EFD
25.12.2009 20:43:04 general: Download finished from server www.avast.com, result: 0x20000004, server response: 12029
25.12.2009 20:43:04 general: Stats www.avast.com, server response: 536870916
25.12.2009 20:43:04 general: POST result: 0x20000004, server response:

[Tarq57]

Try downloading the full installer file direct from Avast. Be sure to select the full installer file, 39.9MB, not the universal setup file.

What AV was used on this computer prior to Avast, and what firewall is in use?