Incompatible network driver

Last week I upgraded a Windows server and also Lotus Domino. Lotus Domino was upgraded from 7.0.3 to 8.5.1 (64 bit). The Windows server is Windows 2008R2, also 64 bit. I get the following error message in the server’s log: C:\Windows\system32\NETBIOS.DLL: The network port driver is an incompatible version

I cannot load the IMAP server task, for then I get also these error.

What is going on here?

Subject: Domino 8.5.2 64bits issues?

Does somebody know if this have been fixed?We get the same warning but with Domino 8.5.2 (also 64 bits on 2K8 R2). The server seems to do his job as expected, just we are facing a high memory usage issue, not sure if this has something to do with?