Hi Diddy,
thanks for your help, I did a repair using add/remove in the control panel and got a Error processing package. Please use full update. Here is the log entry, hope this will help.
26.03.201323:07:22Started: 26.03.2013, 23:07:22
26.03.201323:07:22Operation set to INST_OP_UNKNOWN
26.03.201323:07:22Old version: 5cb (1483)
26.03.201323:07:22Cmdline: /uninstwiz
26.03.201323:07:22SYNCER: Agent=Syncer/5.00 (ais-1483;p)
26.03.201323:07:22Running SETUP_AIS-5cb (1483)
26.03.201323:07:22Operating system: Windows XP ver 5.1, build 2600, sp 3.0 [Service Pack 3]
26.03.201323:07:22Memory: 27% load. Phys:2097151/2097151K free, Page:4194303/4194303K free, Virt:2097151/2097151K free
26.03.201323:07:22Computer WinName: HOPE
26.03.201323:07:22Windows Net User: HOPE\Michael
26.03.201323:07:22Old version: 5cb (1483)
26.03.201323:07:22Deleted registry: Software\AVAST Software\Avast\UpdateReady
26.03.201323:07:22Using temp: C:\DOCUME~1\Michael\LOCALS~1\Temp\_asw_aisI.tm~a02476 (5249M free)
26.03.201323:07:22SGW32AIS::CheckIfInstalled set m_bAlreadyInstalled and m_bIsOldVersionDetected to 1
26.03.201323:07:22DldSrc set to inet
26.03.201323:07:22SYNCER: Agent=Syncer/5.00 (ais-1483;p)
26.03.201323:07:22Computer DnsName: Hope
26.03.201323:07:22Computer Ip Addr: 192.168.1.19
26.03.201323:07:22Setup GUI has been successfuly loaded from DLL.
26.03.201323:07:22Installed in: C:\Program Files\AVAST Software\Avast (5249M free)
26.03.201323:07:22LoadState: Edition=1
26.03.201323:07:22SYNCER: Type: use IE settings
26.03.201323:07:22SYNCER: Auth: another authentication, use WinInet
26.03.201323:07:22Part prg_ais-5cb is installed
26.03.201323:07:22Part vps_win32-13032502 is installed
26.03.201323:07:22Part setup_ais-5cb is installed
26.03.201323:07:22Part jrog-a7 is installed
26.03.201323:07:22Part jrog2-74c is installed
26.03.201323:07:22Debug: Windows Server registry key not retrieved.
26.03.201323:07:22Old version: 5cb (1483)
26.03.201323:07:22Debug: Windows Server registry key not retrieved.
26.03.201323:07:23SetExistingFilesBitmap: 1198->419->418
26.03.201323:07:23GUID: c2070c1c-a8df-4534-b101-57cc1e597ce9
26.03.201323:07:23Server definition(s) loaded for 'main': 110 (maintenance:0)
26.03.201323:07:23SelectCurrent: selected server 'Download314 AVAST5 Server' from 'main'
26.03.201323:07:23SYNCER: Type: use IE settings
26.03.201323:07:23SYNCER: Auth: another authentication, use WinInet
26.03.201323:07:23Debug: Windows Server registry key not retrieved.
26.03.201323:07:31Operation set to INST_OP_REPAIR
26.03.201323:07:31Debug: Windows Server registry key not retrieved.
26.03.201323:07:31Entered SetupProcessAIS::Do( INST_OP_REPAIR )
26.03.201323:07:31Entered SetupProcessWin32Avast::Do( INST_OP_REPAIR )
26.03.201323:07:31Entered SetupProcessWin32::Do( INST_OP_REPAIR )
26.03.201323:07:31Entered SetupProcess::Do( INST_OP_REPAIR )
26.03.201323:07:31Debug: Windows Server registry key not retrieved.
26.03.201323:07:31Entered SetupProcessAIS::Do( INST_OP_UPDATE_INSTALL_PACKAGES )
26.03.201323:07:31Entered SetupProcessWin32Avast::Do( INST_OP_UPDATE_INSTALL_PACKAGES )
26.03.201323:07:31Entering:UpdateInstallPackages
26.03.201323:07:31LoadPartInfo: jrog = jrog-a7 returned 00000000
26.03.201323:07:31LoadPartInfo: jrog2 = jrog2-74c returned 00000000
26.03.201323:07:31LoadPartInfo: program = prg_ais-5cb returned 00000000
26.03.201323:07:31LoadPartInfo: setup = setup_ais-5cb returned 00000000
26.03.201323:07:31LoadPartInfo: vps = vps_win32-13032502 returned 00000000
26.03.201323:07:31FilterOutExistingFiles: 419 & 418 = 1
26.03.201323:07:32IsFullOkay: vps_32-a65.vpx - not okay (DSA_FileVerify failed 0x2000000B)
26.03.201323:07:33Vpu: C:\Program Files\AVAST Software\Avast\Setup\vps_32-a65.vpx, size: 100404583. md5: 249DB60661A2FA23265969B9678C99D6, computemd5 returned 0x00000000, sig: 524E56436CA41DA4D6470DC4196DA5C6FAE2DE1B85F064EB43C36FF2D232F3BB1E11AB5E1AFAFDF3 returned 0x00000000
26.03.201323:07:33IsFullOkay: vps_32-a65.vpx - not okay (DSA_FileVerify failed 0x2000000B)
26.03.201323:07:34Vpu: C:\Program Files\AVAST Software\Avast\Setup\vps_32-a65.vpx, size: 100404583. md5: 249DB60661A2FA23265969B9678C99D6, computemd5 returned 0x00000000, sig: 524E56436CA41DA4D6470DC4196DA5C6FAE2DE1B85F064EB43C36FF2D232F3BB1E11AB5E1AFAFDF3 returned 0x00000000
26.03.201323:07:34SetFullAsMarked: Package vps_32 set to 1
26.03.201323:07:34ArePartsInstallable: 0
26.03.201323:07:34Error processing packages. 0x20000011