been doing it for a month. i did a backup to an sd card,took hours but the hd made it. then crashed again. its my old hp win 7 laptop. been running for years, rarely turned off recently it will run for 20/30 min then crash. later it runs again,same way. literally blue screen crashes... today while booting, usually about 3 minutes, it went into 'chkdsk', something i havent seen sinch...? win 98? went thru a cleanup process i didnt understand. took about 30 ,minutes. been running great now for hours .. anybody understand this ? ! wonder whats going on.? yrs ago i got into op systems a lot but as things started working well i got lazy and in to other things. also got spoiled by an old linux machine that never fails. a desktop just used for taxes and some text stuff. but this my go to comp. i have another hp like it but its w 10 which i hate,,,HATE... wonder whats with my hd?