Just got an E6420 Quad w/ nvs4200, need advice to make it optimal

Hey everyone.

I have an E6420 with these specs below the writing.

I think the Disk score and WEI is a little low for an ssd at 6.9, but is there some reason for this? I have the nvidia gpu and im getting some copper shims, but aside from that does anyone have any advice for making this machine optimal software wise? Im not sure what all of you do to make it run the fastest, but I feel mine could use some links for software.

Occasionally when I open up a program the screen goes pitch black as if it was turned off, so should I be concerned about this?

I plan on upgrading the ram soon to 2133mhz at 16gb

More details about my computer
View attachment 115226
Click image for larger version. Name: Specs.JPG Views: 1 Size: 111.5 KB ID: 115212
Component Details Subscore Base score
Processor Intel(R) Core(TM) i7-2720QM CPU @ 2.20GHz 7.5 4.9
Determined by lowest subscore

Memory (RAM) 4.00 GB 5.9
Graphics Intel(R) HD Graphics Family 4.9
Gaming graphics 1696 MB Total available graphics memory 6.5
Primary hard disk 55GB Free (119GB Total) 6.9
Windows 7 Professional

System
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Manufacturer Dell Inc.
Model Latitude E6420
Total amount of system memory 4.00 GB RAM
System type 64-bit operating system
Number of processor cores 4

Storage
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Total size of hard disk(s) 119 GB
Disk partition (C 55 GB Free (119 GB Total)
Media drive (D CD/DVD

Graphics
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Display adapter type Intel(R) HD Graphics Family
Total available graphics memory 1696 MB
Dedicated graphics memory 64 MB
Dedicated system memory 0 MB
Shared system memory 1632 MB
Display adapter driver version 9.18.13.3788
Primary monitor resolution 1600x900
DirectX version DirectX 10

Network
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Network Adapter Intel(R) 82579LM Gigabit Network Connection

OS Name Microsoft Windows 7 Professional
Version 6.1.7601 Service Pack 1 Build 7601
Other OS Description Not Available
OS Manufacturer Microsoft Corporation
System Name DELL-PC
System Manufacturer Dell Inc.
System Model Latitude E6420
System Type x64-based PC
Processor Intel(R) Core(TM) i7-2720QM CPU @ 2.20GHz, 2201 Mhz, 4 Core(s), 8 Logical Processor(s)
BIOS Version/Date Dell Inc. A21, 11/14/2013
SMBIOS Version 2.6
Windows Directory C:\Windows
System Directory C:\Windows\system32
Boot Device \Device\HarddiskVolume1
Locale United States
Hardware Abstraction Layer Version = "6.1.7601.17514"
User Name Dell-PC\Dell
Time Zone Central Daylight Time
Installed Physical Memory (RAM) 4.00 GB
Total Physical Memory 3.88 GB
Available Physical Memory 1.85 GB
Total Virtual Memory 7.77 GB
Available Virtual Memory 5.64 GB
Page File Space 3.88 GB
Page File C:\pagefile.sys