Hello Friend,
You should if possible change this operating system as windows 7 is no longer supported.
If it is being corrupted many times, it must be hardware.
It must be an old notebook with some problem.
It would be necessary to run some verification tools.
Checking the disk can be important.
Now to try to recover the data, try some utility like RECUVA, but it's not guaranteed at all.
Back up regularly to minimize data loss.
Hugs
Jefferson Clyton Pereira da Silva - [MCSA | MCP | MCTS | MTA | Analista de Banco de Dados - Sql Server e Oracle ]