Step 1: Go to the folder where your path of Downloaded File is there
Ex:C:\Users\Downloads.
Step 2: Copy every File including that torrent file That you have Paused from there
make a backup.save it some where else except c drive.
Step 3: Now Format Your System....
Step 4: After Formatting instal the Torrent Downloading Software Like ex:u torrent.
Step 5: Then copy whole Files That you are Backed up Before And Paste it in Downloads Folder ex: C:\Users\MyDoc\Downloads.
Step 6: Now Double Click the Specified Torrent File That you have paused Earlier.
Step 7: Now the torrent file display in your utorrent software, it automatically jumps to 50% that you are paused earlier.
Step 8: Now Resume and Enjoy Downloading