Help!! I've Lost my hard disk partitions

i started my computer and found that all my partitions except "C" are gone.

This happens a while ago too i was somehow able to recover some of my data but lost most of it. 

I tried checking in Disk Management and it shows it as free space.

i did nothing suspicious last time i worked on my pc

i am using windows 10 pro.

So how to recover my data ??

i tried using some software and i found my partitions and data too but where should i recover it i mean i don't have any partitions to write my data on.

Please help i am in a big trouble  

Firstly, that is not a normal Windows 10 partition structure. Your System Partition is too small and only has about 5GB of free space. For this size hard drive I would only have one partition in addition to the other partitions Windows 10 installs. Was this an upgrade from a previous OS? 

Download Testdisk for Windows. Unzip to folder on your desktop. Run Testdisk > Analyze > Quick Search. Post a Screen Shot. Do you have an external drive you can copy the data to from the missing partitions? How much data was on the missing partition.

Testdisk step by step

i started my computer and found that all my partitions except "C" are gone.

Did you check the closet?

 

i started my computer and found that all my partitions except "C" are gone.

Did you check the closet?

That can be done with MiniTool Partition Magic version 9 or anything similar in power and usability.

well i was able to get them back the help of MiniTool Partition Magic version 9 

thanks

well i was able to get them back the help of MiniTool Partition Magic version 9 

thanks

If this situation "just happened out of nowhere" then I would not believe that it could not happen again.  The behavior you witnessed is not at all normal and strongly suggests something is wrong with the hard drive.  You should run something like Seagate's SeaTools (which works for drive brands other than Seagate) on that drive to see what you get back as far as drive health goes.

As things stand, you're playing with fire as far as your data goes.

+1 Britechguy!  In fact, I'm doing my travel laptop backup images [two Cs and two Ds] as I post.

OP - don't forget your routine backups onto external media.