I had this too, can provide pics if needed.

I got killed by activating a damaged mine but I successfully activated a pristine mine without getting blown up. This could be intended behavior.

Renaming the file steamservice.exe located in steam folder doesnt work for me.
Creating a new local user with admin rights and set the steam client service to log on with this account does work.

I originally figured this out and put it up on Steam: http://steamcommunity.com/app/221100/discussions/1/611696927919473451/#p4
:)

putting it away makes it need re-breaking

I had this. The ones that caused it were badly damaged, dont know if thats important. I fixed myself by continuing to take regular doses of only damaged antibiotics.