Computer Upgrade

[rkh1058s]

I'm looking to upgrade my computer and would like to make sure I'm getting the best upgrade to date. What I have is:

Asus P5ND2-SL1 board with a intel pentium 4, 551 3.40 GHz / 1 MB Cauch with 800 FSB / 755 socket CPU. I'm running XP Pro. My video card is a radeon X800 Pro. Mem. is DDR2 / 533.

I purchased the computer out of an estate sale a few years ago cheap and I have no idea if it was home made, HP, etc.

I would like,

Windows Vista business.

Any idea's that may help me and of course starting a business, monies tight?

The computer will be used for business (mainly internet, no gaming).

Thank you

 

[bigfysh3]

If it were an HP, Dell, or Compaq, you would see it posted all over the chassis and stamped on the motherboard and cards.