Unfortunately, I can't advise you to use such a system on a daily basis, knowing that it hasn't had any security updates for several years. The only advice I can give is to switch to a system that is supported by its supplier.
As it's already a lot of effort to get Weasis supported on many systems and architectures, it's obvious that end-of-life systems can't be supported. Another reason is that I don't think it's appropriate to have a 32-bit system to view exams that can be several GB because of memory limitations.