|You can still download and save Service Pack 3 for future installation when required:|
So grab it while you still can.
There is no single download for individual updates released since SP3, nor are they available now anyway - - it's passed the deadline of April 8th
As long as you install SP3 and install a reliable and trusted antivirus and third-party firewall, you need not worry about security holes.
However, as time progresses you will find fewer and fewer hardware and software manufacturers who support Windows XP on their new products, which is fine if you never intend to buy any new computer software or hardware - - not a very practical situation to be in.
message edited by phil22