Hi First my computer is:

Computer:
Operating System Microsoft Windows XP Professional
OS SERVICE Pack Service Pack 2
Internet Explorer 7.0.5730.11

Motherboard:
ASUS P5LD2 SE

Display:
Video Adapter NVIDIA GeForce 6600 (256 MB)
Monitor AcerView 54eL (9163163)

Multimedia:
Audio Adapter Creative SB X-Fi [NoDB]

Storage:
Floppy Drive Floppy disk drive
Disk Drive ST3120827AS
Disk Drive ST3320620A
OPTICAL Drive HL-DT-ST DVD-RAM GSA-H22L
Optical Drive LITE-ON DVD SOHD-16P9S
Optical Drive YA0439M BKB155I SCSI CdRom Device
Optical Drive YA0439M BKB155I SCSI CdRom Device

Partitions:
C: (NTFS) 114463 MB (48603 MB free)
D: (NTFS) 305242 MB (305168 MB free)

Input:
Keyboard HID Keyboard Device
Keyboard HID Keyboard Device
Mouse HID-compliant mouse

Network:
Network Adapter Alcatel SpeedTouch(tm) USB ADSL RFC1483 (10.0.0.1)
Network Adapter NETGEAR WG311v3 802.11g Wireless PCI Adapter (192.168.0.1)
Network Adapter Realtek RTL8168/8111 PCI-E Gigabit Ethernet NIC

Peripherals:
Printer Fax Lexmark 4200 Series
Printer Lexmark 4200 Series
Printer Microsoft Office Document Image Writer
USB Device Generic USB Hub
USB Device Lexmark 4200 Series
USB Device Razer DIAMONDBACK
USB Device Speed Touch 500 Series
USB Device USB Composite Device
USB Device USB Composite Device
USB Device USB Human Interface Device
USB Device USB Human Interface Device
USB Device USB Human Interface Device
USB Device USB Human Interface Device
USB Device USB Printing Support

The Problem is while im playing games, surfing the NET or even leaving the computer to idle. At random times it just freezes no blue screen of death no nothing so very hard to pin point what could be the problem any suggestions?Well you put on no information about the make, wattage and age of the power supply.

What happened prior to this? Any recent changes in hardware or software?

The most common causes are heat, bad power supply or defective RAM.