When a computer is reinstalled the users often forget to save important data like e-mail, favourites or music files. Depending on how it was reinstalled, the chances for a successful data recovery are good.
The hard drive or partition is formatted and the operating system reinstalled onto it. If the same operating system or another with approximately the same size was installed, it's probable that important files are not overwritten. Often the same sectors are used for saving the operating system as before.
Especially new notebooks and computers have a recovery partition on the storage device. There are three different options:
This is executed like a normal re-installation. Most likely only those sectors will be overwritten that contained the former operating system and the user data is still physically available.
A complete installation can be located on the recovery partition and only the defective files get overwritten. With this case, data recovery should be possible.
The complete image is loaded onto the hard drive sector by sector. Data may be overwritten and lost in the process.
If you realize you forgot to save important data during a re-installation, cancel the process immediately! It increases the chance that your data hasn't been overwritten yet. Attingo developed its own software and has over 22 years of experience with recovering data of formatted storage media.