Explorer view taking too long

[TeamTimmy]

I've been using Explorer view for SharePoint 2007 for some time now, but lately it's been taking a long time to open. Any ideas as to what could be the matter?

[suwunk]

End-users should not use Explorer view to view large documents. Instead, they should use the All Documents view. When you open a SharePoint document library in Explorer view, placing the pointer over any of the enumerated files requests metadata for all of the files in the folder that you are browsing. In some cases, this might request the whole file. This can result in very high load on the server if many large files are simultaneously browsed in Explorer view.

Tune Web server performance (Office SharePoint Server)
Hope this helps!