here is hint my laptop was so slow ..mean too much than regular
i did all kind of lots service try to clean n etc.. but i couldn't do coz so slow.. even norton scan neither,
before starts format, i replaced hard driver and then works normal speed , i had extra hard driver which has win 7 already installed..
when i check my hard driver was rust n rotten some pcb board on hard disk driver,,, i cleaned with alcohole and so replaced again with original had driver , then normal working
coz i did spill some juice or water on my laptop keyboard 1 years ago...
now its working normal speed...
hope this help