Client corruption detected , closing game client . .. now what can i do ?

I see that GM saidin loves the details so , here it is , hope anyone will find an answer .
well, i got the same lap as this one : http://egyptlaptop.com/dell-inspiron-n5110-core-i7.html
full details here :
Model Name
Inspiron n5110
Microprocessor
type : Intel® Core i7-2630M
clock speed : 2.0 GHz
Microprocessor Cache
3rd level cache : 6 MB
Memory& max memory
standard :4.096 MB ( but i expanded it to 6 DDR3 )
maximum expandability : 8GB
technology : DDR3 RAM (1066 MHz)
Video Graphics Video Memory
manufacturer :1024MB NVIDIA® GeForce® GT525M
memory type : shared
Hard Drive
capacity : 500 GB SATA
drive rotation : 5,400 rpm
Multimedia Drive
Internal tray-load DVD+/-RW or optional internal tray-load Blu-ray Disc™ Combo (Read BD, Burn CD/DVD) Drive
Display
size : 15.6"
type : High Definition (720p) WLED Display with TrueLifeTM
internal resolution : 1,366 x 768
Fax/Modem
N/A
Network Card
topology: Fast Ethernet LAN
speed: 10/100
Wireless Connectivity
DELL WIRELESS 1397
Network Support : 802.11b/g
Bluetooth
Sound
speakers : built-in stereo speaker
4-Watt (2 x 2W) High Definition Audio 2.0 Stereo Speakers with SRS Premium SoundTM
Keyboard
INTERNAL ARABIC QWERTY KEYBOA
Windows® keys : Yes
Pointing Device
Touchpad
Expansion
ExpressCard™/34
7-in-1 Media Card Reader Digital (SD) Memory Card, Hi-Capacity Secure Digital (SDHC), Hi-Density Secure Digital (SDHD), Multi Media Card (MMC), Memory Stick (MS), Memory Stick PRO (MS Pro)
xD Picture Card (xD)
External Ports
1x USB 3.0 compliant ports + 2x USB 2.0 compliant ports
1x Integrated network connector 10/100 LAN (RJ45)
1x VGA Port
1x AC adapter connector
1x Audio jacks (1 line-out, 1 Mic-in)
1x HDMI port
1x WebCam
1x Kensington lock slot
Dimensions
(W x D x H) 380 x 259 x 20 (front) / 32.8 (rear) mm
Battery
6-Cell Lithium-Ion battery
Weight
starting at 2.47 kg (including the supplied battery)
What's In The Box
Laptop Dell Inspiron + Charger + Manuals
Operating System:
DOS ( but i installed WIN 7 ultimate)