my pc is not working properly ,How do i upgrade graphics and ram and what do you suggest i use

[Abiloner]

hp compaq elite 8000 sff pc   

 Operating System: Windows 10 Pro 64-bit (10.0, Build 18363) (18362.19h1_release.190318-1202)
Language: English (Regional Setting: English)
System Manufacturer: Hewlett-Packard
System Model: HP Compaq 8000 Elite SFF PC
BIOS: Default System BIOS (type: BIOS)
Processor: Pentium(R) Dual-Core CPU E6500 @ 2.93GHz (2 CPUs), ~2.9GHz
Memory: 8192MB RAM
Available OS Memory: 8064MB RAM
Page File: 2298MB used, 7044MB available
Windows Dir: C:\Windows
DirectX Version: DirectX 12
DX Setup Parameters: Not found
User DPI Setting: 96 DPI (100 percent)
System DPI Setting: 96 DPI (100 percent)
DWM DPI Scaling: Disabled
Miracast: Not Available
Microsoft Graphics Hybrid: Not Supported

Display Devices
Card name: Intel(R) Q45/Q43 Express Chipset (Microsoft Corporation - WDDM 1.1)
Manufacturer: Intel Corporation
Chip type: Intel(R) 4 Series Express Chipset Family
DAC type: Internal
Device Type: Full Device (POST)
Device Key: Enum\PCI\VEN_8086&DEV_2E12&SUBSYS_3646103C&REV_03
Device Status: 0180200A [DN_DRIVER_LOADED|DN_STARTED|DN_DISABLEABLE|DN_NT_ENUMERATOR|DN_NT_DRIVER]
Device Problem Code: No Problem
Driver Problem Code: Unknown
Display Memory: 1695 MB
Dedicated Memory: 64 MB
Shared Memory: 1631 MB