I will not apply the 'fix' by this time because it's a serious drawback to OS efficiency.
This is a part of the setup.log (found in the setup directory), the whole log weights 242k:
08:53:58 min/gen Started: 04.05.2007, 08:53:58
08:53:58 min/gen Running setup_av_pro-3e9 (1001)
08:53:58 nrm/sys Operating system: WindowsXP ver 5.1, build 2600, sp 2.0 [Service Pack 2]
08:53:58 vrb/sys Computer WinName: JOLLY-E896C5927
08:53:58 min/sys Windows Net User: SYSTEM
08:53:58 min/gen Cmdline: /refresh /noreboot /updatevps /verysilent /limitcpu
08:53:58 vrb/gen Operation set to INST_OP_UPDATE_INSTALL_PACKAGES
08:53:58 min/gen Old version: 3e9 (1001)
08:53:58 nrm/gen SGW32P::CheckIfInstalled set m_bAlreadyInstalled to 1
08:53:58 nrm/int SYNCER: Type: use IE settings
08:53:58 nrm/int SYNCER: Auth: another authentication, use WinInet
08:53:58 vrb/pkg Part prg_av_pro-3e9 is installed
08:53:58 vrb/pkg Part vps-73802 is installed
08:53:58 vrb/pkg Part news-4b is installed
08:53:58 vrb/pkg Part setup_av_pro-3e9 is installed
08:53:58 vrb/pkg Part jrog-3 is installed
08:53:58 min/gen Old version: 3e9 (1001)
08:53:59 vrb/fil SetExistingFilesBitmap: 1024->150->150
08:53:59 min/gen GUID: 508da512-9a96-48e4-bd98-c4d4e91cb1fe
08:53:59 vrb/gen Entering:UpdateInstallPackages
08:53:59 min/pkg Load C:\Archivos de programa\Alwil Software\Avast4\Setup\prod-av_pro.vpu
08:53:59 vrb/pkg LatestPartInfo: jrog = jrog-3
08:53:59 vrb/pkg LatestPartInfo: news = news-4b
08:53:59 vrb/pkg LatestPartInfo: program = prg_av_pro-3e9
08:53:59 vrb/pkg LatestPartInfo: setup = setup_av_pro-3e9
08:53:59 vrb/pkg LatestPartInfo: vps = vps-73802
08:53:59 vrb/pkg ArePartsInstallable: 1
08:54:17 min/pkg vps: updated [073802]
08:54:17 vrb/fil Fix security on: C:\Archivos de programa\Alwil Software\Avast4\*.*
08:54:18 vrb/fil Fix security on: C:\Archivos de programa\Alwil Software\Avast4\images\*.*
08:54:18 vrb/fil Fix security on: C:\Archivos de programa\Alwil Software\Avast4\SPANISH\*.*
08:54:18 vrb/fil Fix security on: C:\Archivos de programa\Alwil Software\Avast4\SPANISH\HELP\*.*
08:54:18 vrb/fil Fix security on: C:\Archivos de programa\Alwil Software\Avast4\SPANISH\HtmlData\*.*
08:54:18 nrm/pkg Transferred files: 0
08:54:18 nrm/pkg Transferred bytes: 0
08:54:18 nrm/pkg Transfer time: 0 ms
08:54:18 vrb/fil NeedReboot=false
08:54:18 vrb/sys Reboot set by filRenameOnReboot(C:\Archivos de programa\Alwil Software\Avast4\Setup\reboot.txt,)
08:54:18 vrb/fil MoveFileEx("C:\Archivos de programa\Alwil Software\Avast4\Setup\reboot.txt", NULL)
08:54:18 min/gen Return code: 0x20000000 [Something done]
08:54:18 min/gen Stopped: 04.05.2007, 08:54:18
08:54:20 min/gen Started: 04.05.2007, 08:54:20
08:54:20 min/gen Running setup_av_pro-3e9 (1001)
08:54:20 nrm/sys Operating system: WindowsXP ver 5.1, build 2600, sp 2.0 [Service Pack 2]
08:54:20 vrb/sys Computer WinName: JOLLY-E896C5927
08:54:20 min/sys Windows Net User: SYSTEM
08:54:20 min/gen Cmdline: /stopstat /verysilent /noreboot
08:54:20 vrb/gen Operation set to INST_OP_[16]
08:54:20 min/gen Old version: 3e9 (1001)
08:54:20 nrm/gen SGW32P::CheckIfInstalled set m_bAlreadyInstalled to 1
08:54:20 nrm/int SYNCER: Type: use IE settings
08:54:20 nrm/int SYNCER: Auth: another authentication, use WinInet
08:54:20 vrb/pkg Part prg_av_pro-3e9 is installed
08:54:20 vrb/pkg Part vps-73802 is installed
08:54:20 vrb/pkg Part news-4b is installed
08:54:20 vrb/pkg Part setup_av_pro-3e9 is installed
08:54:20 vrb/pkg Part jrog-3 is installed
08:54:20 min/gen Old version: 3e9 (1001)
08:54:20 nrm/pkg Transferred files: 0
08:54:20 nrm/pkg Transferred bytes: 0
08:54:20 nrm/pkg Transfer time: 0 ms
08:54:20 vrb/fil NeedReboot=false
08:54:20 vrb/sys Reboot set by filRenameOnReboot(C:\Archivos de programa\Alwil Software\Avast4\Setup\reboot.txt,)
08:54:20 vrb/fil MoveFileEx("C:\Archivos de programa\Alwil Software\Avast4\Setup\reboot.txt", NULL)
08:54:20 min/gen Return code: 0x20000001 [Nothing done]
08:54:20 min/gen Stopped: 04.05.2007, 08:54:20
08:58:15 min/gen Started: 04.05.2007, 08:58:15
08:58:15 min/gen Running setup_av_pro-3e9 (1001)
08:58:15 nrm/sys Operating system: WindowsXP ver 5.1, build 2600, sp 2.0 [Service Pack 2]
08:58:15 vrb/sys Computer WinName: JOLLY-E896C5927
08:58:15 min/sys Windows Net User: SYSTEM
08:58:15 min/gen Cmdline: /stopstat /verysilent /noreboot
08:58:15 vrb/gen Operation set to INST_OP_[16]
08:58:15 min/gen Old version: 3e9 (1001)
08:58:15 nrm/gen SGW32P::CheckIfInstalled set m_bAlreadyInstalled to 1
08:58:15 nrm/int SYNCER: Type: use IE settings
08:58:15 nrm/int SYNCER: Auth: another authentication, use WinInet
08:58:15 vrb/pkg Part prg_av_pro-3e9 is installed
08:58:15 vrb/pkg Part vps-73802 is installed
08:58:15 vrb/pkg Part news-4b is installed
08:58:15 vrb/pkg Part setup_av_pro-3e9 is installed
08:58:15 vrb/pkg Part jrog-3 is installed
08:58:15 min/gen Old version: 3e9 (1001)
08:58:15 nrm/pkg Transferred files: 0
08:58:15 nrm/pkg Transferred bytes: 0
08:58:15 nrm/pkg Transfer time: 0 ms
08:58:15 vrb/fil NeedReboot=false
08:58:15 vrb/sys Reboot set by filRenameOnReboot(C:\Archivos de programa\Alwil Software\Avast4\Setup\reboot.txt,)
08:58:15 vrb/fil MoveFileEx("C:\Archivos de programa\Alwil Software\Avast4\Setup\reboot.txt", NULL)
08:58:15 min/gen Return code: 0x20000001 [Nothing done]
08:58:15 min/gen Stopped: 04.05.2007, 08:58:15
14:28:12 min/gen Started: 04.05.2007, 14:28:12
14:28:12 min/gen Running setup_av_pro-3e9 (1001)
14:28:12 nrm/sys Operating system: WindowsXP ver 5.1, build 2600, sp 2.0 [Service Pack 2]
14:28:12 vrb/sys Computer WinName: JOLLY-E896C5927
14:28:12 min/sys Windows Net User: SYSTEM
14:28:12 min/gen Cmdline: /stopstat /verysilent /noreboot
14:28:12 vrb/gen Operation set to INST_OP_[16]
14:28:12 min/gen Old version: 3e9 (1001)
14:28:12 nrm/gen SGW32P::CheckIfInstalled set m_bAlreadyInstalled to 1
14:28:12 nrm/int SYNCER: Type: use IE settings
14:28:12 nrm/int SYNCER: Auth: another authentication, use WinInet
14:28:12 vrb/pkg Part prg_av_pro-3e9 is installed
14:28:12 vrb/pkg Part vps-73802 is installed
14:28:12 vrb/pkg Part news-4b is installed
14:28:12 vrb/pkg Part setup_av_pro-3e9 is installed
14:28:12 vrb/pkg Part jrog-3 is installed
14:28:12 min/gen Old version: 3e9 (1001)
14:28:12 nrm/pkg Transferred files: 0
14:28:12 nrm/pkg Transferred bytes: 0
14:28:12 nrm/pkg Transfer time: 0 ms
14:28:12 vrb/fil NeedReboot=false
14:28:12 vrb/sys Reboot set by filRenameOnReboot(C:\Archivos de programa\Alwil Software\Avast4\Setup\reboot.txt,)
14:28:12 vrb/fil MoveFileEx("C:\Archivos de programa\Alwil Software\Avast4\Setup\reboot.txt", NULL)
14:28:12 min/gen Return code: 0x20000001 [Nothing done]
14:28:12 min/gen Stopped: 04.05.2007, 14:28:12