I did a straightforward reboot on a server last night and when it came back online it repeatedly kept generating AUTO FAIL alerts when trying to load PSCORE.NLM, PSCL.NLM and LEGACYLM.NLM and finally ended with the message:
Error on one or more Digitally Signed Object. All Digitally Signed Objects have been unloaded.

A critical server error occurred immediately after this leaving the server in a "partially up" state, in that partition replication and user access to the volumes is intact but the console prompt doesn't come up.

I had a short downtime window and when that ran out I had to back off from trying to resolve this issue. This looks like it could be a BTRIEVE/ArcServe related issue but I thought I would check here to see if anyone had any information or advice.