I've been hitting the wrong keys for more years than I care to remember. Can you get a rewind? With my advice, yes you can…

This article appears in the May 07 issue of PC Advisor, available now in all good newsagents.

Some people are keystroke perfect when they type. They never accidentally delete a file, they never overwrite their important research with inconsequential banter pasted from an email – and they never have a hair out of place. I'm not of that mould. The Undo function is my saviour.

But undoing an action performed in error is a lot trickier when you've installed a program, upgraded a component or updated your system. And this is where System Restore comes in: it automatically bookmarks your PC at regular intervals so that you can return to a particular point should things go wonky.

When Microsoft was designing Vista, its developers clearly thought long and hard about the amount of stuff we all store on our PCs – and what a pain in the posterior it can be to track it all down. The search function in Vista certainly helps here, but there's another feature that may prove invaluable.

Previous Version is as useful as its title implies. It's perfect should you need to track the progress of a document, see how it's been added to and revised, or get your hands on the original version after someone helpfully distilled its content and cut out a crucial detail.

Previous Version can be useful if you've stored several copies of a document, although it's not immediately apparent which one is the most up to date. This happens all too easily as we traipse our files from pillar to post, from home to hotel room, and to overheated office – forgetting along the way whether the version on the USB key, the one that we've emailed to ourselves, or the one on the laptop is the most up-to-date make-or-break presentation we're supposed to be giving.