Sony DLNA Freezing

Been running a Sony BDP-BX37 Bluray with DLNA for several years with Serviio. A few issues, but always figured them out with the board's help. Been working fine, but since reformatting my computer and reinstalling EXACTLY the same way, I get freezing at least 4-5 times per 42 minute tv program. Sometimes it restarts by itself, but I usually do a fast reverse and play to get it working again. I even tried another model Sony and did the same thing. I'm totally lost. I know the Sony's have their issues with DLNA but....
Could be a computer problem?
Best recommendation Bluray to work with Serviio???