DNG Converter unusable

In order to optimize storage space I convert pictures from NEF to DNG. Unfortunately the Adobe DNG Converter is almost unusable. 

The software works fine on older PCs with four core processors. On my newer PC with 8 cores and 16 threads it is impossible to use. It seems like a memory problem. Sometimes it works but most of the time it renders the whole PC unusable, often crashes Windoes Explorer. Even restarts won’t solve the tangled up DNG Converter. Frustrating.