you must restart your computer by holding power button

Losing my mind! Please help:

I have an early 2006 imac.. haven't had a problem in 10 yrs, now all of a sudden..

I upgraded from Tiger to Snow Leopard a few years back and make regular Time Machine backups. First I started having problems copying files to my external drives. Did the usual.. reset pram & tried to repair permissions/disk with disk utility. When that stopped working, I tried disk utility from my eDrive (Tech Tool Pro 7) & safe mode... still had problems. So I ran Disk Warrior and that's when everything got really bad. It said it repaired disk and let me log back in successfully- everything seemed to be working temporarily but when I tried to Shut Down computer I started getting that grey screen- "You must restart computer by holding power button...etc etc."

After 3 days of trying every repair I could think of including all tools in Tech Tool Pro, I decided to wipe the hard drive, assuming I could restore a backup from Time Machine...nope. It let me install snow leopard but would not boot up. It let me restore Time Machine backup and still wouldn't boot up. So I figured maybe hard drive is shot, so I did the same with a working external drive (installed Snow Leopard & Time Machine backup)- still will not boot up. I keep getting that grey (hold down power button to restart) screen almost immediately after rebooting. I get the white screen, apple pops up, but instead of spinning wheel.. grey screen of death. Safe mode no longer works so all I can do is boot edrive (Tech Tool Pro 7), where I can still see all of my files on both internal & external hard drive, so I know they're still there, somewhere. Here is the problem report, Please Help me 🙂 :

Interval Since Last Panic Report: 75506 sec

Panics Since Last Report: 9

Anonymous UUID: 5F6B4049-466B-4C0C-9DA3-18D071AA7AAE

Sun Sep 18 23:47:30 2016

panic(cpu 1 caller 0x47f5ad): "Process 1 exec of /sbin/launchd failed, errno 8\n"@/SourceCache/xnu/xnu-1504.15.3/bsd/kern/kern_exec.c:3145

Backtrace (CPU 1), Frame : Return Address (4 potential args on stack)

0x34d53e48 : 0x21b837 (0x5dd7fc 0x34d53e7c 0x223ce1 0x0)

0x34d53e98 : 0x47f5ad (0x5cf950 0x831c08 0x8 0x0)

0x34d53ef8 : 0x4696d2 (0x477bd20 0x1fe 0x452a7e0 0x80000001)

0x34d53f38 : 0x48fee5 (0x4721b7c 0x84baa0 0x34d53f88 0x226e2f)

0x34d53f68 : 0x219432 (0x4721b7c 0xffffff7f 0x34d53f88 0x2a45c9)

0x34d53fa8 : 0x2aacb4 (0xffffffff 0x1 0x22f8f5 0x227c4b)

0x34d53fc8 : 0x2a1976 (0x0 0x0 0x2a17ab 0x3f97aa4)

BSD process name corresponding to current thread: init

Mac OS version:

Not yet set

Kernel version:

Darwin Kernel Version 10.8.0: Tue Jun 7 16:33:36 PDT 2011; root:xnu-1504.15.3~1/RELEASE_I386

System model name: iMac4,1 (Mac-F42787C8)

System uptime in nanoseconds: 1644144210

unloaded kexts:

(none)

loaded kexts:

com.Maxtor.driver.PowSecDriver 4.3.19 - last loaded 1279016630

com.roxio.BluRaySupport 1.1.6

com.apple.iokit.SCSITaskUserClient 2.6.8

com.apple.driver.StorageLynx 2.6.1

com.apple.driver.Oxford_Semi 2.6.1

com.apple.driver.LSI_FW_500 2.6.1

com.apple.driver.IOFireWireSerialBusProtocolSansPhysicalUnit 2.6.1

com.apple.driver.initioFWBridge 2.6.1

com.apple.driver.AppleUSBHub 4.2.4

com.apple.BootCache 31.1

com.apple.driver.AppleIntelPIIXATA 2.5.1

com.apple.AppleFSCompression.AppleFSCompressionTypeZlib 1.0.0d1

com.apple.driver.AppleUSBEHCI 4.2.4

com.apple.driver.AppleFWOHCI 4.7.3

com.apple.iokit.IOAHCIBlockStorage 1.6.4

com.apple.driver.AppleEFINVRAM 1.4.0

com.apple.driver.AppleAHCIPort 2.1.7

com.apple.driver.AppleUSBUHCI 4.2.0

com.apple.driver.AppleRTC 1.3.1

com.apple.driver.AppleHPET 1.5

com.apple.driver.AppleACPIButtons 1.3.6

com.apple.driver.AppleSMBIOS 1.7

com.apple.driver.AppleACPIEC 1.3.6

com.apple.driver.AppleAPIC 1.4

com.apple.driver.AppleIntelCPUPowerManagementClient 142.6.0

com.apple.security.sandbox 1

com.apple.security.quarantine 0

com.apple.nke.applicationfirewall 2.1.14

com.apple.driver.AppleIntelCPUPowerManagement 142.6.0

com.apple.iokit.IOSCSIBlockCommandsDevice 2.6.8

com.apple.iokit.IOUSBMassStorageClass 2.6.7

com.apple.driver.AppleUSBComposite 3.9.0

com.apple.iokit.IOSCSIMultimediaCommandsDevice 2.6.8

com.apple.iokit.IOBDStorageFamily 1.6

com.apple.iokit.IODVDStorageFamily 1.6

com.apple.iokit.IOCDStorageFamily 1.6.1

com.apple.iokit.IOFireWireSerialBusProtocolTransport 2.1.0

com.apple.iokit.IOFireWireSBP2 4.0.6

com.apple.iokit.IOATAPIProtocolTransport 2.5.1

com.apple.iokit.IOSCSIArchitectureModelFamily 2.6.8

com.apple.driver.XsanFilter 402.1

com.apple.iokit.IOUSBUserClient 4.2.4

com.apple.iokit.IOATAFamily 2.5.1

com.apple.driver.AppleFileSystemDriver 2.0

com.apple.iokit.IOFireWireFamily 4.2.6

com.apple.iokit.IOAHCIFamily 2.0.6

com.apple.iokit.IOUSBFamily 4.2.4

com.apple.driver.AppleEFIRuntime 1.4.0

com.apple.iokit.IOHIDFamily 1.6.6

com.apple.iokit.IOSMBusFamily 1.1

com.apple.security.TMSafetyNet 6

com.apple.kext.AppleMatch 1.0.0d1

com.apple.driver.DiskImages 289

com.apple.iokit.IOStorageFamily 1.6.3

com.apple.driver.AppleACPIPlatform 1.3.6

com.apple.iokit.IOACPIFamily 1.3.0

com.apple.iokit.IOPCIFamily 2.6.5

Model: iMac4,1, BootROM IM41.0055.B08, 2 processors, Intel Core Duo, 2 GHz, 2 GB, SMC 1.1f5

Graphics: ATI Radeon X1600, ATY,RadeonX1600, PCIe, 128 MB

Memory Module: global_name

AirPort: spairport_wireless_card_type_airport_extreme (0x14E4, 0x89), Broadcom BCM43xx 1.0 (5.10.131.42.4)

Bluetooth: Version 2.4.5f3, 2 service, 12 devices, 1 incoming serial ports

Network Service: AirPort, AirPort, en1

Serial ATA Device: Maxtor 6L250M0, 233.76 GB

Parallel ATA Device: MATSHITADVD-R UJ-846

USB Device: Built-in iSight, 0x05ac (Apple Inc.), 0x8501, 0xfd400000 / 6

USB Device: Hub, 0x050d (Belkin Corporation), 0x0416, 0xfd500000 / 4

USB Device: Logitech USB Keyboard, 0x046d (Logitech Inc.), 0xc315, 0xfd550000 / 5

USB Device: USB Receiver, 0x046d (Logitech Inc.), 0xc52f, 0xfd530000 / 3

USB Device: FreeAgent, 0x0bc2 (Seagate LLC), 0x2100, 0xfd100000 / 2

USB Device: IR Receiver, 0x05ac (Apple Inc.), 0x8240, 0x7d200000 / 3

USB Device: Bluetooth USB Host Controller, 0x05ac (Apple Inc.), 0x8206, 0x7d100000 / 2

FireWire Device: OneTouch, Maxtor, Up to 400 Mb/sec