crash of my machine

I installed solaris 5.9 on a machine SunBlade100 512Mo of RAM and 18Go of hard disc, after the installation I have remark that the machine starts again after 10mn with 15 mn of walk, I downloaded and installed the last patchs on the machine but the pobl�me persists. someone can help me and tell me what's the problem ?
here the logs enrgistr�s before the crash landing of the machine

Jun 14 15:59:52 nms1 ebus: [ID 521012 kern.info] su0 at ebus0: offset 0,3f8
Jun 14 15:59:52 nms1 genunix: [ID 936769 kern.info] su0 is /pci@1f,0/isa@7/serial@0,3f8
Jun 14 15:59:52 nms1 ebus: [ID 521012 kern.info] su1 at ebus0: offset 0,2e8
Jun 14 15:59:52 nms1 genunix: [ID 936769 kern.info] su1 is /pci@1f,0/isa@7/serial@0,2e8
Jun 14 15:59:53 nms1 pcipsy: [ID 370704 kern.info] PCI-device: network@c,1, eri0
Jun 14 15:59:53 nms1 genunix: [ID 936769 kern.info] eri0 is /pci@1f,0/network@c,1
Jun 14 15:59:55 nms1 genunix: [ID 454863 kern.info] dump on /dev/dsk/c0t0d0s1 size 511 MB
Jun 14 15:59:56 nms1 eri: [ID 517527 kern.info] SUNW,eri0 : 100 Mbps half duplex link up
Jun 14 15:59:58 nms1 pseudo: [ID 129642 kern.info] pseudo-device: devinfo0
Jun 14 15:59:58 nms1 genunix: [ID 936769 kern.info] devinfo0 is /pseudo/devinfo@0
Jun 14 15:59:59 nms1 pseudo: [ID 129642 kern.info] pseudo-device: pm0
Jun 14 15:59:59 nms1 genunix: [ID 936769 kern.info] pm0 is /pseudo/pm@0
Jun 14 16:00:05 nms1 savecore: [ID 570001 auth.error] reboot after panic: Fatal PCI UE Error
Jun 14 16:00:05 nms1 savecore: [ID 748169 auth.error] saving system crash dump in /var/crash/nms1/*.11
Jun 14 16:00:10 nms1 pseudo: [ID 129642 kern.info] pseudo-device: tod0
Jun 14 16:00:10 nms1 genunix: [ID 936769 kern.info] tod0 is /pseudo/tod@0
Jun 14 16:00:15 nms1 pseudo: [ID 129642 kern.info] pseudo-device: vol0
Jun 14 16:00:15 nms1 genunix: [ID 936769 kern.info] vol0 is /pseudo/vol@0
Jun 14 16:00:17 nms1 ebus: [ID 521012 kern.info] su0 at ebus0: offset 0,3f8
Jun 14 16:00:17 nms1 genunix: [ID 936769 kern.info] su0 is /pci@1f,0/isa@7/serial@0,3f8
Jun 14 16:00:17 nms1 ebus: [ID 521012 kern.info] su1 at ebus0: offset 0,2e8
Jun 14 16:00:17 nms1 genunix: [ID 936769 kern.info] su1 is /pci@1f,0/isa@7/serial@0,2e8
Jun 14 16:00:21 nms1 scsi: [ID 193665 kern.info] sd0 at uata0: target 1 lun 0
Jun 14 16:00:21 nms1 genunix: [ID 936769 kern.info] sd0 is /pci@1f,0/ide@d/sd@1,0
Jun 14 16:00:26 nms1 ebus: [ID 521012 kern.info] isadma0 at ebus0: offset 0,0
Jun 14 16:00:28 nms1 ebus: [ID 521012 kern.info] fd0 at ebus0: offset 0,3f0
Jun 14 16:00:28 nms1 genunix: [ID 936769 kern.info] fd0 is /pci@1f,0/isa@7/dma@0,0/floppy@0,3f0

Thanks