Quite few of our computers which are in Workgroups are losing the credentials for Outlook and network devices. in short, all the entries from Credential Manager (control userpasswords2) disappear. Doesn't matter how many times I will put it back in there. We have antivirus on all of those PCs with regular weekly scans. I have also run Malwarebytes scan on them. All plugins are up to date. Windows has all updates installed. Users are local admins. Computers affected are mainly Windows 7 x64 (not sure if it actually happened on 32 bit versions but quite possible).
Is there a fix for it?