Frank has a one-year-old HP computer, and he noticed that his computer has gone up to 100% use. He doesn't really have anything on it. Leo says that the computer is probably doing some indexing and it's using the extra space temporarily to do it. Leo says to use SysInternals in Windows. There are some great tools, including Process Monitor, which can show exactly what a computer is doing and how much resources are being devoted to it. It's possible that a "runaway process" can be doing it.