Running Windows 7, 64 bit with Norton 360 more than a year with zero problems. I had downloaded a .xls spreadsheet file for nutrition content of common foods from a USDA government website. I worked on it in Excel for an hour or so, saving many times. When I was done and quit Excel, it hung and I got an error window saying a necessary file for Excel was missing and I needed to run a restore procedure (or something like that). I fell for it and clicked OK, and that was the beginning of the end, and could not stop it - that's when I held down the power button to shut down. Now, at each boot attempt, it wants to run a check disk. Sometimes the check disk will go and other times it just sits there. Each time it does run, it finds lots of problems and appears to move or recover hundreds of files. Also reports some bad sectors. Sometimes the check will complete and attempt to boot, other times, just hangs. When scan disk finishes, the text screen goes away too fast for me to read the messages. Sometimes I skip the scan and let it try to boot. Sometimes I get full blue screen. Twice it did boot, but exxxxtreeeemly slow - no sense even trying to install malewarebytes. I was able to click COMPUTER, and open C drive, but trying to open the USERS folder, a green bar progresses all the way across the top of the window, then just hangs and I have to hold the power button as the only choice to turn off computer. I'm afraid to keep doing this, since the check disk seems to be moving / recovering files, and this could be bad for trying to recover data later. I removed the drive and put it in an external case with USB 3.0, attached to a good Win 7 laptop that has malwarebytes installed. I guess my corrupt Win 7 drive secretly has 2 partitions. The laptop "mounts" drive F, then for drive G, it finds a problem with that partition and wants to run a scan disk, but I select "continue without scanning". It "mounts" the drive and shows up as 2 drives (partitions?): System Reserved (F:) 70.3 Mb free of 99.9 Mb Local Disk (G:) 436 Gb free of 931 Gb F: is empty (maybe just hidden?). Attempting to access the USERS folder on G:, the green bar goes all the way across the top of the window and hangs. But I can kill the window with Task Manager, so my laptop is fine. Ran malewarebytes on the F: drive (partition ?) and it ran with no problems. Ran malewarebytes on the G: drive and it hangs part way through scanning the first folder. I'm about to download/buy and run "GetDataBack" to at least try and recover my data files (precious videos and photos, and of course, no backups). I will stand by. Thanks for your help. DerekB