I'm not sure where to begin with the catalogue of my problems: - I'm not very knowledgeable about the problems, or how to rectify them, which have occurred during the last month. My set up is Dell Precision Workstation 360, Intel Pentium 4 processor, 2.80 GHz, Bios Version A05, Level 2 cache: 512 KB intergrated. Windows XP SP3. with Kaspersky Internet Security 2010. 1. I have received the following message when attempting to install any downloads of updates excluding Windows updates. NSIS ERROR The installer you are trying to use is corrupted or incomplete. This could be the result of a damaged disk, a failed download or a virus. You may want to contact the author of this installer to obtain a new copy. It may be possible to skip this check by using /NRC command line (NOT RECOMMENDED) 2. I am constantly receiving repeated reports of two HEUR virus after a full Kaspersky scan which I thought would be capable of removing them. When I attempt to locate them I receive a 'Not Found' message or may not exist. My Kaspersky is regularly updated automatically but seems to be stuck on Kaspersky 9.0.0. 463 regardless of the updates. I do have a log report of each update which shows they have been installed. When I access the kaspersky website I am advised that my Kaspersky programme is out of date and a new version is available to download. However I am unable to upgrade to the new version due to problem 1. above. If I do have a damaged disk as suggested above how do I affect a repair of the disk? I am seriously considering uninstalling everything, formatting the disk, and starting afresh. I would appreciate a response which does not tax my limited knowledge or capabilities.