We are using XP SP2 (all patches applied) and client 4.91 SP2 -> works fine.

Recently we had to update to 4.91 SP4 (because of security reasons and a problem terminating iPrinter-installations on workstation) -> performance for file access is extremely poor wtih sp4; as an example: a DOS netware mapping (NW6.5.7) with client sp2 ist 10 times faster than with sp4! Even file saving in MS-Office 2003 is very slow.

We had to stop the rollout. We applied all patches (10 at the moment) for the client after sp4 -> no success. After removing the client and reinstalling it with sp2 everything works fine again.

Any ideas? Thanks in advance!