[p4] Files from a Folder just submitted, can't remove folder without a reboot

[Bhavbhuti Nathwani]

Hi all

Has anybody noticed such a behavior as below.  I will try to keep a
watch on this repeating.  Here is my method.

I have a DOS app that is under P4Win ver. 2005.1.  The method
implemented by me is that I will unzip the project onto my HDD and
work on it.  Once finished I open the whole project folder for
add/edit and revert unchanged files.  The remaining files I will
submit back to P4Win.

Once this is done the batch file will then zip the project back and
remove the folder, actually it is pkzip move command which does the
folder removal.

Today I submitted 5 files 3 in "project\sprs" folder and 2 in
"project\vsosys" folder.  After the whole process I found out that the
"project\sprs" folder is still in existence and will not be removed
even with "deltree project" command nor from windows.

Now only thing I can do is reboot and I am pretty sure I will be able
to remove the folder, if not already removed by windows.

Has anybody come across such behavior.

Please advise.
Regards
Bhavbhuti