Gartner predicts more attacks on banner ad viewers, as virus and trojan writers discover the ease with which Microsoft Windows XP can be compromised through the "Bofra" method of infecting computers with unwanted, perhaps malicious, software. The analyst firm noted that Windows 2000 and XP installations without the SP2 update are particularly vulnerable, as are Apache webservers. Gartner, which has been frequently critical of Microsoft, predicted that the software giant will fail to catch up to security hole exploiters, which seem to be finding potential exploits at a faster clip than Microsoft can patch them. And, tellingly, many Windows users are failing to install the frequent patches, leaving many systems open to infection, contributing to the speed with which online pandemics can spread.