On a vanilla Gateway PC with 6GB RAM (50%), 500GB available disk space, the HD has started showing a very periodic 100% write usage (~12 sec on, 1 sec off). The Read usage is quite normal. This makes the system extremely slow. Resource Monitor reports many processes with PID 4, but none seem to change their activity with the write busy cycle. The Write busy cycle will occasionally change when I start a copy to a network drive. the process with the highest write usage is ProgramData\Microsoft\Search\Data\Applications\Windows\Windows/edb. Any help would be appreciated.