Help me. Endian system down after this job (everyday, same time)

[Guest]

[gigatoon]

Every time it stops working after this job

@ 1h   [ -x /bin/run-parts ] && run-parts --report /etc/anacron.hourly

look in system logs

Jun 21 17:39:49 fcron[28923] Job [ -x /bin/run-parts ] && run-parts --report /etc/anacron.hourly started for user root (pid 28924)
Jun 21 17:40:34 fcron[28923] Job [ -x /bin/run-parts ] && run-parts --report /etc/anacron.hourly completed
Jun 21 17:50:52 kernel [ 0.000000] Linux version 2.6.32.25-57.e40.i586 (root@buildmaster.office) (gcc version 4.1.2 20070626 (Endian 4.1.2-14)) #1 SMP Thu Nov 11 10:01:30 EST 2010
Jun 21 17:50:52 kernel [ 0.000000] KERNEL supported cpus:
Jun 21 17:50:52 kernel [ 0.000000] Intel GenuineIntel
Jun 21 17:50:52 kernel [ 0.000000] AMD AuthenticAMD
Jun 21 17:50:52 kernel [ 0.000000] NSC Geode by NSC
Jun 21 17:50:52 kernel [ 0.000000] Cyrix CyrixInstead
Jun 21 17:50:52 kernel [ 0.000000] Centaur CentaurHauls
Jun 21 17:50:52 kernel [ 0.000000] Transmeta GenuineTMx86
Jun 21 17:50:52 kernel [ 0.000000] Transmeta TransmetaCPU
Jun 21 17:50:52 kernel [ 0.000000] UMC UMC UMC UMC
Jun 21 17:50:52 syslog-ng[2665] syslog-ng starting up; version='2.0.10'
Jun 21 17:50:52 kernel [ 0.000000] BIOS-provided physical RAM map:

in red line i press the reset button
And here is the log of yesterday

Jun 20 17:39:03 fcron[27057] Job [ -x /bin/run-parts ] && run-parts --report /etc/anacron.hourly started for user root (pid 27058)
Jun 20 17:39:59 fcron[27057] Job [ -x /bin/run-parts ] && run-parts --report /etc/anacron.hourly completed
Jun 21 08:25:16 kernel [ 0.000000] Linux version 2.6.32.25-57.e40.i586 (root@buildmaster.office) (gcc version 4.1.2 20070626 (Endian 4.1.2-14)) #1 SMP Thu Nov 11 10:01:30 EST 2010
Jun 21 08:25:16 kernel [ 0.000000] KERNEL supported cpus:

this job is in crontab "/etc/crontab"
Because this job will update virus signatue
from above job it run every hour
but I do not understand why it is will stop at about 17:xx everyday

now I solved this problem by setting a task that runs every month

Services -> Antivirus Engine
i choose Monthly on Clamav signature update schedule and save them

Or be caused hardware .I dont think So.
sorry i am poor in use en language.

[gigatoon]

yesterday, Again

Jun 22 17:35:03 fcron[22989] Job [ -x /bin/run-parts ] && run-parts --report /etc/anacron.hourly started for user root (pid 22990)
Jun 22 17:35:05 fcron[22989] Job [ -x /bin/run-parts ] && run-parts --report /etc/anacron.hourly completed
Jun 22 17:54:25 dhcpd Wrote 28 leases to leases file.
Jun 23 08:42:07 kernel [ 0.000000] Linux version 2.6.32.25-57.e40.i586 (root@buildmaster.office) (gcc version 4.1.2 20070626 (Endian 4.1.2-14)) #1 SMP Thu Nov 11 10:01:30 EST 2010
Jun 23 08:42:07 kernel [ 0.000000] KERNEL supported cpus:

But now I think the problem is not related with job in crontab.
because new red line in system log.its last action before system down.
system down that i mean Cooling fan still working.