Hello,
I use procmon a lot to watch what my system is doing, and I noticed that Easyphp makes Explorer.exe do the following actions constantly, the path being everywhere "C:\Program Files\EasyPHP 3.0\EasyPHP.exe", and the result "Success" unless noted.
CreateFile
CreateFileMapping => File Locked With Only Readers
CreateFileMapping
LoadImage
CloseFile
QueryOpen => Fast IO Disallowed
CreateFile
QueryBasicInformationFile
CloseFile
I don't know where it starts, but it loops on these actions.
I'm using Vista Ultimate and EasyPHP3.0, but I think I had also noticed that problem, or something similar, on Windows XP with previous versions of EasyPHP.