GetFileAttributesW strange delay

Question

Hello!

Some of my users are experimenting a strange delay in one of my programs. The situation:

I am copying some file from machine A to machine B. I use CopyFileExW. This works well. Directly after copying the file (if the operation was successfully done), I use GetFileAttributesW to get and modify the created file's attributes. Now the problem: on some machines GetFileAttributesW is almost instantaneously done, but on SOME other machines it can take up to 29 seconds!!!!!!!!! to return.

I may add that the destination is in the same server for the "fast" machines and for the "slow" ones.

Is there any logical explanation for this issue?