Need Help upgrading my PC

[Neilson]

Hello!

Good day! I would need to get some advise on how or what to add to my PC to get it upgraded. I am not certain as to what parts to acquire, I am a bit hesitant to buy some parts because it may not be compatible with the current hardware that I have on my PC. Details of my computer is shown below:

OPERATING SYSTEM:
Windows XP Professional service Pack1 (build 2600)

PROCESSOR
1.70 Gigahertz Intel Celeron
8 Kilobyte primary memory cache
128 Kilobyte secondary memory cache

DRIVES:
41.10 Gigabytes Usable Hard Drive Capacity
39.34 Gigabytes Hard Drive Free Space

ASUS CD-S520/A (CD-ROM drive)
2.5" format removeable media (Floppy Drive)

Maxtor 6E040L0 (Hard Drive) (41.11 GB) -- drive 0
s/n E16V5SWE, rev NAR61590, SMART STATUS: Healthy

SYSTEM MODEL
ECS = M925 = 1.0
System Serial Number = 00000000
Enclosure Type: Desktop

MAIN CIRCUIT BOARD
Board ECS M925 1.0
Bus Clock : 100 megahertz
BIOS: American Megatrends Inc. 07.00T 04/02/01

MEMORY MODULES
96 Megabytes Installed Memory

Slot '0' is empty
Slot '1' has 128 MB
Slot '2' is empty
Slot '3' is empty

LOCAL DRIVE VOLUMES
c (NTFS on drive 0) 41.10 GB 39.34 GB Free

CONTROLLER
Standard Floppy Disk controller
Primary IDE Channel (Controller)
Secondary IDE Channel (Controller)
VIA Bus Master IDE Controller

BUS ADAPTERS
Standard Enhanced PCI to USB Host Controller
VIA Rev 5 or later USB Universal Host Controller (3x)

COMMUNICATIONS
Best Data Data Modem

CNET PRO200 PCI Fast Ethernet Adapter
VIA PCI 10/100MB Fast Ethernet Adapter

MULTIMEDIA
MPU-401 Compatible MIDI Device
Standard Game Port

...I need your expert opinion.