PC randomly freeze

Hye.
I have a problem with my windows.
It randomly freeze, usually right after startup. It has no blue screen whatsoever. I usually need to do hard reset 2-3 times before my sytem stabilise.
I thought it's because of my hard disk, so I bought an SSD yesterday and have installed windows in it.
I thought it solve the problem until tonight my pc hangs again twice.
I still use the old hard disk as storage. It should not cause the windows to freeze, should it?

I'm running windows 7 64 bit.
I have updated the bios today. problem still occur.
One thing i notice is my CPU temp is ~60 degree at idle which is too hot. is this the cause of the problem? but the temperature has been that for like 6 months, where the freezing only starting to occur at recent weeks.

Can you guys help me solve this problem. thanks

Everest hardware summary:

Computer:
Computer Type ACPI x64-based PC

Motherboard:
CPU Type DualCore AMD Phenom II X2 Black Edition 550, 2800 MHz (15.5 x 181)
Motherboard Name Asus M2N68-AM Plus (2 PCI, 1 PCI-E x1, 1 PCI-E x16, 2 DDR2 DIMM, Audio, Video, Gigabit LAN)
Motherboard Chipset nVIDIA nForce 7025-630a, AMD K10
System Memory 4096 MB (DDR2-800 DDR2 SDRAM)
DIMM1: Corsair XMS2 CM2X2048-6400C5 2 GB DDR2-800 DDR2 SDRAM (5-5-5-18 @ 400 MHz) (4-4-4-13 @ 270 MHz)
DIMM2: Corsair XMS2 CM2X2048-6400C5 2 GB DDR2-800 DDR2 SDRAM (5-5-5-18 @ 400 MHz) (4-4-4-13 @ 270 MHz)
BIOS Type AMI (06/29/09)
Communication Port Communications Port (COM1)
Communication Port Printer Port (LPT1)

Display:
Video Adapter ATI Radeon HD 4800 Series (1024 MB)
Video Adapter ATI Radeon HD 4800 Series (1024 MB)
3D Accelerator ATI Radeon HD 4870 (RV770)
Monitor Acer V193W [19" LCD] (LC1080344212)

Multimedia:
Audio Adapter ATI Radeon HDMI @ ATI RV770/790 - High Definition Audio Controller
Audio Adapter nVIDIA nForce 7025-630a (MCP68SE) - High Definition Audio Controller

Storage:
IDE Controller Standard Dual Channel PCI IDE Controller
Storage Controller ASOE0DDH IDE Controller
Storage Controller NVIDIA nForce Serial ATA Controller
Storage Controller NVIDIA nForce Serial ATA Controller
Disk Drive OCZ VERT EX PLUS SCSI Disk Device (55 GB)
Disk Drive SAMSUNG HD103SJ SCSI Disk Device (931 GB)
Disk Drive WDC WD50 00AAKS-00V1A SCSI Disk Device (465 GB)
Optical Drive Optiarc DVD RW AD-7240S SCSI CdRom Device (DVD+R9:12x, DVD-R9:12x, DVD+RW:24x/8x, DVD-RW:24x/6x, DVD-RAM:12x, DVD-ROM:16x, CD:48x/32x/48x DVD+RW/DVD-RW/DVD-RAM)
Optical Drive RWZML PYJ852ZGH SCSI CdRom Device
SMART Hard Disks Status OK

Partitions:
C: (NTFS) 57238 MB (23355 MB free)
D: (NTFS) 488.3 GB (289.8 GB free)
E: (NTFS) 443.2 GB (400.8 GB free)
F: (NTFS) 465.7 GB (213.2 GB free)
Total Size 1453.1 GB (926.6 GB free)

CPU is WAY too hot for idle.

Check heatsink is on correctly and fan is working. Should be in the 30s idle.

You've slow cooked your CPU. Just because it worked for months at that temperature, it doesn't mean you can carry on doing that without problems.

I shudder to think how hot it got under load if it's idling at 60.

You've probably killed the CPU, which is bad. On the good side, it's a rubbish CPU anyway, treat yourself to a new, better one. :)

I am waiting for my new CPU. we'll see how it goes :)