Encoder CC 2018 will only render one file at a time before crashing?

Hi guys,

I'm having a pretty serious issue that's been occurring for about 2 weeks now and no amount of searching on the internet yields any solutions or even any similar situation.

Intel Core i7-5820K, GTX750Ti, 64GB DDR4-2133

Windows 7 Professional with latest updates

Creative Cloud with latest updates

Premiere Pro 12.0.1 Build 69

Encoder 12.0.1 Build 64

The problem is, no matter the source of the files being rendered (be it directly dropped in to transcode or an output from an AE or PP project), it will render exactly one file before crashing with the generic "report to Adobe" dialog. The input formats for transcode is usually 50fps MP4 AVC 8- or 10-bit and the output is regular H.264 and/or DNxHD 1080p 50fps SQ. It seems to be a problem with this machine only, on another machine with also the exact same software parameters (i7-3820, 32GB, 750Ti), it not only renders without issue but more than twice as quickly.

Can someone advise please?