Windows 7: Computer HDD wiped itself is there anyway to recover data

Please help me

i was using my computer last night and it became unresponsive and slow, so i shut it down but when i restarted it , it froze on hte windows logo in boot up, i then restarted it again and it said that recent hard ware change might have caused a boot up problem and gave me the options of boot up normally or use system repair, i tried system repair but that was incrediablly slow and by the time i managed to start the auto-repair it had taken several hours to get there, it then started doing auto repair but over 15 hours later it was still "repairing" i then decided to go to reinstall windows but once i did that there was no windows.old folder and 800 gb of data had vanished is there anyway to recover what was wiped please help me

You may try Recuva.

Is the HD even detected in BIOS setup? If so run the HD maker's diagnostics to check its condition. This as well as other steps if necessary are found in Troubleshooting Windows 7 Failure to Start

Hi there, Since I was facing problem where I lost all my personal valuable information files after reinstallation of windows 7 and was looking for a recovery tool to recover files after windows 7 reinstall which got lost.finally got the solution and here is download link which had given me support in recovering my data

If Windows can still see and read the drive you can try this Copy & Paste - in Windows Recovery Console. Sometimes a live Linux distro can see and read data on the drive.