<p>Is your PC beginning to slow down? Are programs unresponsive and simple tasks becoming frustrating? If so, don’t feel pressurised into splashing out on a costly replacement just yet. Instead, read our expert tips to find out how simple tricks and a spot of basic housekeeping can provide an instant speed boost – all for free. We’ll also explain how to carry out easy, inexpensive upgrades that can make even the oldest computers perform as fast as the latest models. Plus, in our bonus ‘Build a Better PC’ section you can find out how easy, cheap and rewarding it can be to construct a lightning-fast computer of your very own design.