Please, post the last 100-150 lines of avast log: C:\Program Files\Alwil Software\Avast4\DATA\log\Setup.log
Please these are the lines 100-150:
12.12.2007 15:56:43.000 1197435403 general Started: 12.12.2007, 15:56:43
12.12.2007 15:56:43.000 1197435403 general Running setup_av_pro-44a (1098)
12.12.2007 15:56:43.000 1197435403 system Operating system: WindowsXP ver 5.1, build 2600, sp 2.0 [Service Pack 2]
12.12.2007 15:56:43.000 1197435403 system Memory: 60% load. Phys:206436/523564K free, Page:934660/1279888K free, Virt:2069284/2097024K free
12.12.2007 15:56:43.000 1197435403 system Computer WinName: ASHOK-HOME
12.12.2007 15:56:43.000 1197435403 system Windows Net User: SYSTEM
12.12.2007 15:56:43.000 1197435403 general Cmdline: /verysilent /noreboot /stopstat "C:\WINDOWS\TEMP\aswUpdSum.ini"
12.12.2007 15:56:43.000 1197435403 general Operation set to INST_OP_[16]
12.12.2007 15:56:43.000 1197435403 general Old version: 44a (1098)
12.12.2007 15:56:43.000 1197435403 system Using temp: C:\WINDOWS\TEMP\_av_proI.tm~a02812 (42093M free)
12.12.2007 15:56:43.000 1197435403 general SGW32P::CheckIfInstalled set m_bAlreadyInstalled to 1
12.12.2007 15:56:43.000 1197435403 system Installed in: C:\Program Files\Alwil Software\Avast4 (42093M free)
12.12.2007 15:56:43.000 1197435403 internet SYNCER: Type: use IE settings
12.12.2007 15:56:43.000 1197435403 internet SYNCER: Auth: another authentication, use WinInet
12.12.2007 15:56:43.000 1197435403 package Part prg_av_pro-44a is installed
12.12.2007 15:56:43.000 1197435403 package Part vps-7121100 is installed
12.12.2007 15:56:43.000 1197435403 package Part news-4b is installed
12.12.2007 15:56:43.000 1197435403 package Part setup_av_pro-44a is installed
12.12.2007 15:56:43.000 1197435403 package Part jrog-23 is installed
12.12.2007 15:56:43.000 1197435403 general Old version: 44a (1098)
12.12.2007 15:56:43.000 1197435403 package Transferred files: 0
12.12.2007 15:56:43.000 1197435403 package Transferred bytes: 0
12.12.2007 15:56:43.000 1197435403 package Transfer time: 0 ms
12.12.2007 15:56:43.000 1197435403 package Retries total: 0
12.12.2007 15:56:43.000 1197435403 package Retried files: 0
12.12.2007 15:56:43.000 1197435403 package Tried servers: 0
12.12.2007 15:56:43.000 1197435403 file NeedReboot=false
12.12.2007 15:56:43.000 1197435403 general Return code: 0x20000001 [Nothing done]
12.12.2007 15:56:43.000 1197435403 general Stopped: 12.12.2007, 15:56:43
12.12.2007 21:16:53.000 1197454613 general Started: 12.12.2007, 21:16:53
12.12.2007 21:16:53.000 1197454613 general Running setup_av_pro-44a (1098)
12.12.2007 21:16:53.000 1197454613 system Operating system: WindowsXP ver 5.1, build 2600, sp 2.0 [Service Pack 2]
12.12.2007 21:16:53.000 1197454613 system Memory: 48% load. Phys:269332/523564K free, Page:1053244/1279888K free, Virt:2069284/2097024K free
12.12.2007 21:16:53.000 1197454613 system Computer WinName: ASHOK-HOME
12.12.2007 21:16:53.000 1197454613 system Windows Net User: SYSTEM
12.12.2007 21:16:53.000 1197454613 general Cmdline: /verysilent /noreboot /stopstat "C:\WINDOWS\TEMP\aswUpdSum.ini"
12.12.2007 21:16:53.000 1197454613 general Operation set to INST_OP_[16]
12.12.2007 21:16:53.000 1197454613 general Old version: 44a (1098)
12.12.2007 21:16:53.000 1197454613 system Using temp: C:\WINDOWS\TEMP\_av_proI.tm~a02992 (41985M free)
12.12.2007 21:16:53.000 1197454613 general SGW32P::CheckIfInstalled set m_bAlreadyInstalled to 1
12.12.2007 21:16:53.000 1197454613 system Installed in: C:\Program Files\Alwil Software\Avast4 (41985M free)
12.12.2007 21:16:53.000 1197454613 internet SYNCER: Type: use IE settings
12.12.2007 21:16:53.000 1197454613 internet SYNCER: Auth: another authentication, use WinInet
12.12.2007 21:16:53.000 1197454613 package Part prg_av_pro-44a is installed
12.12.2007 21:16:53.000 1197454613 package Part vps-7121100 is installed
12.12.2007 21:16:53.000 1197454613 package Part news-4b is installed
12.12.2007 21:16:53.000 1197454613 package Part setup_av_pro-44a is installed
12.12.2007 21:16:53.000 1197454613 package Part jrog-23 is installed
12.12.2007 21:16:53.000 1197454613 general Old version: 44a (1098)
12.12.2007 21:16:53.000 1197454613 package Transferred files: 0
12.12.2007 21:16:53.000 1197454613 package Transferred bytes: 0
12.12.2007 21:16:53.000 1197454613 package Transfer time: 0 ms
12.12.2007 21:16:53.000 1197454613 package Retries total: 0
12.12.2007 21:16:53.000 1197454613 package Retried files: 0
12.12.2007 21:16:53.000 1197454613 package Tried servers: 0
12.12.2007 21:16:53.000 1197454613 file NeedReboot=false
12.12.2007 21:16:53.000 1197454613 general Return code: 0x20000001 [Nothing done]
12.12.2007 21:16:53.000 1197454613 general Stopped: 12.12.2007, 21:16:53