My Phenom 9550 worked perfectly on Win 7 x64. I see no reason that Win 10 would be any different. In fact, i suspect it will work even better. It is a K10 processor just like the later Phenom II.
Here is a chart that shows it compatible if you want more help: http://www.game-debate.com/games/index.php?g_id=20768&canMyCpuRunIt=Windows%2010
My Phenom 9550 worked perfectly on Win 7 x64. I see no reason that Win 10 would be any different. In fact, i suspect it will work even better. It is a K10 processor just like the later Phenom II.
Here is a chart that shows it compatible if you want more help: http://www.game-debate.com/games/index.php?g_id=20768&canMyCpuRunIt=Windows%2010