T55 WinMate is a free system optimisation suite with an unusually lengthy list of features.

And so, of course, there's all the usual functionality you'd expect to find in this kind of suite: it can find junk or duplicate files, clean application histories, fix Registry problems, control your startup programs, uninstall unwanted software, and so on.

But there are also many less familiar features. T55 WinMate will warn you if you're missing a Windows security patch, for instance. There are options to back up your drivers or IE favourites. A right-click menu manager allows you to remove unwanted options from the file and IE right-click menus, and you even get a "software box" that makes it easy to locate and download some of the best free software around.

There are problems here, too. The "OS Optimize" section includes the entirely useless "Remove DLLs from memory" 'tweak', for instance, which hasn't done anything useful in years. And if the authors have included it anyway, that leaves us wondering just how effective their other tweaks might be.

And other options are poorly explained. What does "Immune Disk Virus AutoRun" do, for instance? If it's only to "stop AutoRun Virus" then why does the program offer to apply it to your hard drives, as well as removable storage?

And returning to the tweaks, what would, say, selecting "Optimise the FileSystem(NTFS) management to improve FileSystem response time" do? We can think of a few possibilities, but if we're going to adjust our settings we'd like to have a better idea of what might happen, and there's little in the way of explanation here - which makes us more than a little uneasy.

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T55 WinMate has some genuinely useful modules, but others are less effective, and a lack of documentation makes it tricky to separate the two. It may still be worth a look, but be careful what you're doing