W98 and XP etc probably ME and 2000 as well;
There's more to your history than the history log; There's also your index.dat(s) which store a record of all visted websites, they are superhidden that means not easily visible in Windows even with 'show all files' checked. Or dos unless you unset sys and hid attribs; the secret folder is hidden by a 'desktop.ini file in temporary internet files and called 'content.ie5' {folder can be viewed when you've drilled deep enough into temporary internet files by clicking in the address box at the very end of pathname; when you get the I-beam, type content.ie5 and click Go; you will now see about 4 more folders and index.dat; there's an occurence in each of your user accounts and another in Windows folder; you need something like 'sweeper' by emery [freeware] or to clear these files they can't easily be done manually. After all that, remember your Isp also have a copy of every site you visited which they must retain by law (ripa) for at least 6 months, Home Office ruling. - too much information? :-)