hi guys I want to ask you something maybe someone will know my issue.First I had windows 7 ultimate and I wanted to try windwos 10 I download and install windwos 10.But it takes to much ram and I go to option go back to windows 7 ultimate maybe it was more than a month but the option was and first time didn't work its stoped I give restart and I try again and tsecond time work.But when I go to google or other apps my cpu was 100% its lag to much I disable win uptade superfetch but still lag can someone help me