Sometimes I find machines that do this with EVERYTHING plugged in. We reduce to bare minimum and try again.
I don't see much good news from a google on startrep.
I recently moved my computer, and I turned my tower on and off a few times before realizing the monitor want plugged in properly. When I did get it plugged in, it left me stuck on the initial windows loading screen or it will say "diagnosing your PC" forever and take me to "automatic repair" and ask if I want to try a system restore, which fails and gives me a "StartRep.exe application error - the instruction at .... Referenced memory at ... the memory could not be read. I've also gotten it to attempt a system refresh which fails.
I use 4 8gb ram sticks, and have tried booting with each one singularly with similar results.
Anything I could try or any information as to what could be wrong would be hugely appreciated.