The explorer was not able to open the WinFS 'folder' when I clicked on it. I noticed the following error message in the error log stored in C:\Windows\System32\WinFS\Log\errorlog

"2005-09-06 14:07:00.24 spid3s      AppDomain 3 (Store{5A895282-3901-45BE-BB94-4E44C4FA4924}.dbo[runtime].2) doomed due to memory pressure."

Have about 512 MB of memomery and according to the task manager only 375 MB is commited. img:question hmm..

Just finished downloading & installing WinFS beta 1 on my XP machine.

Already noticed a couple of things, If u copy a .doc file into the "Default Store" and double click it is opens fine, but if I copy a ".chm" into the "Default Store" and double click it, it opens and just displays the content tree the main content area has a error message, i guessing some security issues.

Update: The following KB link helped me solve this issue http://support.microsoft.com/kb/896054/