Mi iMac late 2009 21" restarting everytime and appears this message

Anonymous UUID: F1048074-415F-E217-BDF9-55A104DEC64C

Thu Oct 1 16:25:52 2015

*** Panic Report ***

panic(cpu 1 caller 0xffffff8008816df2): Kernel trap at 0xffffff8008ce557b, type 14=page fault, registers:

CR0: 0x0000000080010033, CR2: 0x000000000012a343, CR3: 0x0000000123611000, CR4: 0x0000000000002660

RAX: 0x00000000fffff000, RBX: 0xffffff80212d77b0, RCX: 0xffffff80212d77b0, RDX: 0xffffff8013746080

RSP: 0xffffff809b8c3320, RBP: 0xffffff809b8c33a0, RSI: 0x0000000002000000, RDI: 0xffffff801314c300

R8: 0x0000000000000000, R9: 0x0000000000000000, R10: 0xffffff8008e15e20, R11: 0x0000000069b2b000

R12: 0x000000000012a333, R13: 0x0000000000000000, R14: 0x0000000000000000, R15: 0xffffff8016347500

RFL: 0x0000000000010286, RIP: 0xffffff8008ce557b, CS: 0x0000000000000008, SS: 0x0000000000000010

Fault CR2: 0x000000000012a343, Error code: 0x0000000000000002, Fault CPU: 0x1

Backtrace (CPU 1), Frame : Return Address

0xffffff809b8c2fd0 : 0xffffff800872ad21

0xffffff809b8c3050 : 0xffffff8008816df2

0xffffff809b8c3210 : 0xffffff8008833ca3

0xffffff809b8c3230 : 0xffffff8008ce557b

0xffffff809b8c33a0 : 0xffffff8008cdc9e1

0xffffff809b8c33d0 : 0xffffff7f89fa9ae3

0xffffff809b8c3410 : 0xffffff7f89fdfa51

0xffffff809b8c3450 : 0xffffff7f89fdb0a6

0xffffff809b8c3480 : 0xffffff7f89fdaa43

0xffffff809b8c34c0 : 0xffffff7f89fe230b

0xffffff809b8c3550 : 0xffffff7f88e4bea1

0xffffff809b8c35a0 : 0xffffff7f88e4e58c

0xffffff809b8c3600 : 0xffffff7f88e54047

0xffffff809b8c36d0 : 0xffffff7f8a45a31d

0xffffff809b8c3840 : 0xffffff800898068d

0xffffff809b8c38a0 : 0xffffff8008927073

0xffffff809b8c39f0 : 0xffffff8008933a9e

0xffffff809b8c3b80 : 0xffffff8008936c84

0xffffff809b8c3c30 : 0xffffff80089352d7

0xffffff809b8c3d60 : 0xffffff8008932ae7

0xffffff809b8c3dd0 : 0xffffff8008b62939

0xffffff809b8c3e90 : 0xffffff8008b6773a

0xffffff809b8c3ec0 : 0xffffff800895c34d

0xffffff809b8c3f50 : 0xffffff8008c4b376

0xffffff809b8c3fb0 : 0xffffff80088344a6

Kernel Extensions in backtrace:

com.apple.iokit.IOStorageFamily(2.0)[D0ABB996-2084-3A05-A166-5951D925EF80]@0xff ffff7f88e47000->0xffffff7f88e6cfff

com.apple.iokit.IOAHCIFamily(2.7.5)[DAF0353B-16D5-385A-A0F3-FD5CF3BA07F2]@0xfff fff7f89fa6000->0xffffff7f89fbbfff

com.apple.iokit.IOAHCIBlockStorage(2.7.1)[CCEA5B6E-7057-31D5-BC5E-1A7108DDEF4F] @0xffffff7f89fd9000->0xffffff7f89ff0fff

dependency: com.apple.iokit.IOAHCIFamily(2.7.5)[DAF0353B-16D5-385A-A0F3-FD5CF3BA07F2]@0xfff fff7f89fa6000

dependency: com.apple.iokit.IOStorageFamily(2.0)[D0ABB996-2084-3A05-A166-5951D925EF80]@0xff ffff7f88e47000

com.apple.BootCache(36.0)[D15A99DB-6509-311C-AF95-A94AA38DA2E3]@0xffffff7f8a458 000->0xffffff7f8a461fff

BSD process name correspondi

Model: iMac10,1, BootROM IM101.00CC.B00, 2 processors, Intel Core 2 Duo, 3.06 GHz, 4 GB, SMC 1.52f9

Graphics: NVIDIA GeForce 9400, NVIDIA GeForce 9400, PCI, 256 MB

Memory Module: BANK 0/DIMM0, 2 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353737334348532D4348392020

Memory Module: BANK 0/DIMM1, 2 GB, DDR3, 1067 MHz, 0x80CE, 0x4D34373142353637334548312D4346382020

AirPort: spairport_wireless_card_type_airport_extreme (0x168C, 0x8F), Atheros 9280: 4.0.74.0-P2P

Bluetooth: Version 4.3.6f3 16238, 3 services, 27 devices, 1 incoming serial ports

Network Service: Wi-Fi, AirPort, en1

Serial ATA Device: ST3500418ASQ, 500,11 GB

Serial ATA Device: HL-DT-ST DVDRW GA11N

USB Device: Internal Memory Card Reader

USB Device: Built-in iSight

USB Device: USB Laser Mouse

USB Device: BRCM2046 Hub

USB Device: Bluetooth USB Host Controller

USB Device: IR Receiver

Thunderbolt Bus: