The old version of the ESET Online Scanner was installed in %programfles%/ESET folder. I used Add/Remove Programs to uninstall it. After uninstallation was completed I deleted this folder. I decided to use Dr.Web Cureit instead of the ESET Online Scanner on my WinXP machine. I don't want to install full version of the ESET product, because I have Avira Free Antivirus. I will contunue to use the current version of the ESET Online Scanner on my Windows 7 machine.