yes hello ! let me explain my set-up so you can understand my situation . on a DELL XPS 8300 [ desktop ] , i have windows 7 ultimate x64 . this PC has a startech esata-6gb expansion card . so on an esata enclosure , i have windows 8 pro x64 . i have had this set-up since August 2012 , with no problems . that is no problems until about a month ago ? it was normal when i turn on the esata drive and then boot from it . to see windows 8 do a start-up scan before it reached the login screen . and if i had ever un-plugged the drive , or if there had been a power failure . it was normal to see windows 8 doing this [ diagnosing/scanning/repairing ] . and once completed windows 8 would boot normally . but this one time [ about a month back ] this seemed to be taking way to long . so i paid closer attention to the notice on my screen . it seems that windows 8 was 40% completed in repairing my windows 7 drive ? i saw no need to stop this ? at 40% , if there was damage ? then it had already been done . windows 8 finished and booted normally . so from windows 8 , i explored my windows 7 drive . and what had been over 300gb of data . was now reduced to about 170gb . i tried several recovery methods , which all failed . i replace the corrupt windows 7 , with my Casper 7 image back-up . rightly or wrongly , i have narrowed this issue down to -Auto CHKDSK During Windows Startup . i found this article and tried it's suggested FIX ? [ i don't have permission to post links ] Raymond CC blogs -Disable or Stop Auto CHKDSK During Windows Startup i also went one step farther , i have EasyBCD on both the windows 7 drive and the windows 8 drive . in theEasyBCD set-up menu , i chose the option " wait for user selection " . and in my bios set-up menu i set windows 8 as my secondary boot drive . so now i can't get to window 8 , unless i hold down F12 . and then select the windows 8 drive in my bios options . and this is exactly how i want it ! until i am confident that windows 8 won't destroy my windows 7 drive again . so , ..... has this happened to any other users ? what kind of a FIX has worked for you ? any suggestions and comments are welcome . i was a fairly HAPPY windows 8 camper , ... until this happened . thank you .