This happens on a number of PCs (WinXP SP3), where an application will simply lock up. It may be the browser (usually Firefox in our case) or it may be Visual Studio, or something else, but every time it seems the same, the application locks up, sometimes for minutes. There is no spike in CPU usage. Usually the other applications that are open at the time continue to work fine, but other times it takes the
explorer.exe process with it.
Given the lack of CPU spike, or any other metric I can see, how can I diagnose what is causing this issue?