[Boot Problem] Acer Aspire 5520

[Ancyent]

I have a acer aspire 5520

Additional Specifications
Processor Brand: 	AMD
Processor Type: 	Turion 64 X2 Dual-Core
Hard Drive Size: 	160GB
System RAM: 	2048 MB
Display
Display Type: 	15.4" TFT
Widescreen Display: 	Yes
Max Resolution: 	1280 x 800 ( WXGA )
Processor
Multi-Core Technology: 	Dual-Core
Processor: 	AMD Turion 64 X2 mobile technology TL-58 / 1.9 GHz
Chipset Type: 	NVIDIA nForce 630M
Cache Memory
Type: 	L2 cache
Installed Size: 	1 MB
Storage
Hard Drive: 	160 GB
RAM
Installed Size: 	2 GB / 4 GB (max)
Technology: 	DDR2 SDRAM - 667 MHz
Configuration Features: 	2 x 1 GB
Optical Storage
Type: 	DVD±RW (±R DL) / DVD-RAM - integrated
Read Speed: 	24x (CD) / 8x (DVD±R) / 6x (DVD±R DL)
Write Speed: 	24x (CD) / 8x (DVD±R) / 4x (DVD±R DL)
Networking
Data Link Protocol: 	Ethernet, Fast Ethernet, Gigabit Ethernet, IEEE 802.11b, IEEE 802.11g
Wireless LAN Supported: 	Yes
Video
Graphics Processor / Vendor: 	NVIDIA GeForce 7000M TurboCache supporting 896MB
Audio
Audio Input: 	Microphone
Operating System / Software
OS Provided: 	Microsoft Windows Vista Home Premium
Software: 	Acer Launch Manager, NTI CD-Maker (OEM), Norton Internet Security (90 days subscription), Acer GridVista, Acer Arcade, CyberLink PowerProducer (OEM), Acer Empowering Technology, Acer Crystal Eye
Battery
Technology: 	6-cell lithium ion
Installed Qty: 	1
Capacity: 	4000 mAh
Run Time (Up To): 	3 hour(s)
Notebook Camera
Camera Type: 	Integrated
Product Dimensions
Width: 	14.4 in
Height: 	1.7 in
Depth: 	10.8 in
Weight: 	6.2 lbs
Card Reader
Supported Flash Memory Cards: 	SD Memory Card, Memory Stick, Memory Stick PRO, MultiMediaCard, xD-Picture Card
Miscellaneous
Features: 	Wake on LAN
Compliant Standards: 	ACPI 3.0
Power
Voltage Required: 	AC 120/230 V ( 50/60 Hz )

I get this error when i try to boot

missing file  -  /Library/Preferences/SystemConfiguration/com.apple.boot.plist