Windows 10 can be down graded to windows 7 apon request 
Model
BrandLenovo
ModelG550(2958FDU)
Part Number2958FDU
Quick Info
Operating System Windows 7 Home Premium 64-bit
CPU Intel Pentium dual-core T4400 2.2G
Screen15.6" WXGA
Memory 4 GB DDR3
Storage 250 GB
Optical Drive Dual Layer DVD Burner
Graphics Card Intel GMA 4500M
Video Memory Shared memory
CommunicationLAN and WLAN
Battery Life3.80 hours
Dimensions (W x D x H)15.00" x 9.60" x 1.04" - 1.43"
Weight5.95 lbs.
CPU
CPU TypeIntel Pentium dual-core
CPU Name Intel Pentium T4400
CPU L2 Cache 1MB
CPU FSB800 MHz
Display
Screen Size 15.6"
Wide Screen Support Yes
Display TypeWide XGA
Resolution 1366 x 768
LCD FeaturesLED backlight
Operating System
Operating SystemWindows 7 Home Premium 64-bit
Graphics
GPU/VPU Intel GMA 4500M
Video MemoryShared system memory
Graphic Type Integrated Card
Storage
HDD250GB


HDD InterfaceSATA
Memory
Memory 4GB
Memory SpeedDDR3 1066
Memory Spec2 GB x 2
Memory Type204-Pin DDR3 SO-DIMM
Memory Slot (Total)2
Memory Slot (Available)0
Max Memory Supported8 GB
Optical Drive
Optical Drive TypeDual layer DVD Burner
Optical Drive InterfaceIntegrated
Communications
LAN 10/100Mbps
WLAN 802.11b/g Wireless LAN
Ports
USB 3
Video Port1 x VGA
Audio Ports1 x Microphone Jack, 1 x Headphone Jack
Audio
AudioIntegrated Sound card
Speaker2 x 2W stereo speakers
Input Device
TouchpadYes
KeyboardStandard
Webcam 0.3MP
Power
Battery6-cell Lithium Ion


Dimensions & Weight
Dimensions (W x D x H)15.00" x 9.60" x 1.04" - 1.43"
Weight5.95 lbs.