|Windows 7 64 bit with Fsecure and Malwarebytes website blocking only.
Version 3.64 works perfectly, but both new betas result in "SBIE2204 Cannot start sandboxed service RpcSs (-1)"
Thanks in anticipation.
I installed both software into a test computer but I don't see this problem. Perhaps you have some settings in F-Secure or MalwareBytes that block Sandboxie? Alternatively, it could be causing by something else entirely. I suggest that you post a Resource Access Monitor log. More here:
Also, I want to move the discussion about your problem to a new topic in the version 3.65.02 forum.