Solidworks fails to rebuild a part (invalid geometry with combine feature) on my machine only, and will only build without errors if I execute an 'options reset' before opening the file. I need to reset my options every time I open the part, otherwise it gives the error... What's going on and how do I fix this?

Solidworks 2015 SP4 + ePDM...
It's working on nine other people's machines, three of whom have the exact same hardware...
I'm the only one with Solidworks premium if that could somehow be causing an issue...