laptop lenovo z510 very slow and using a lot of ram after changing windows

azadjannati

Honorable
Sep 4, 2013
3
0
10,510
hi every one ... i had a windows 10 but i didnt like it for some issues it had so i removed the windows and installed my windows 7 again . after changing the windows and installing the softwares the system got very slow and thinks a lot specially on the windows start up ... i updated the windows and the drivers but it did not solve the problem ... i wonder what has happened ... help please ... thanks