Do you find that Windows Search isn't much use? Does it fail to find files that you know are there? Me too. But a helpful reader wrote to give me the answer.

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

Do you find that Windows Search isn't much use? Does it fail to find files that you know are there? This is because it searches only files with a known file type, so it won't look at documents with odd extensions.

To change this behaviour, start the Registry Editor and expand HKEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Control\ContentIndex. Select ContentIndex, then double-click 'FilterFilesWithUnknownExtensions' and set its value to 1. If the value doesn't exist, right-click and select New, DWORD Value.

Name it 'FilterFilesWithUnknownExtensions' and then set it to 1.

Thanks to PC Advisor reader Guy McNeill for sending this tip to [email protected]