Do you have all the windows updates for Win 7?http://support.amd.com/en-us/kb-articles/Pages/KB1603.aspx
Is win 7 64bit? Curious as adding win 7 to the boot menu of win 10 will be difficult otherwise. Normally helps to install 7 and then 10. Only as 7 was made before 10 (obvious, I know) but as such has no idea what 10 is and may wipe the boot partition.