found this info for XP
Dreamweaver CS5.5: C:\Documents and Settings\Your User Name\Application Data\Adobe\Dreamweaver CS5.5\[language]\Configuration
I followed this and deleted the WinFileCache file...RE-booted and file still shows up everytime!! ARG!
Every time I open a page in DW the error pos up....
Every time you restart DW, it'll create a new file cache although the name will be different. That's why I asked if you looked BEFORE or AFTER starting DW after a reboot. Are you sure you are deleting the file that is in the correct location?