Any particular reason you want that exact version? I have 14.3 RU10 on Win7 working fine (except for the recent update problem-- definitions by LiveUpdate are not coming through)
People here said earlier that the particular version ( 14.3 RU7 Patch 3 ) is doing well with Windows 7 i.e. even for the updates!
Funny you should say that, I have a system that I updated from 14.3 RU4 to 14.3 RU10 and nothing changed. What version are you specifically running right now? I need to compare notes... Also, RU7 is essentially out of date, and some people are already chasing the second version (refresh-2) of RU10.
Is the SEP LiveUpdate feature working on your Win10 rig? I can't tell if it's a Win7 thing only or if more systems are affected. I have a W7 system with the older (but still maintained) v14.3 RU1 that worked fine until LU stopped functioning at the same time my other W7 unit with v14.3 RU4 got the error.