Tables and database crashing, rows being deleted (no replies)

My MySQL tables and whole MySQL server started few months crashing.

After some time after I realized that some rows in almost all tables started missing (sometimes few a day, once 15000 rows at once in one table). In some tables were generated strange numbers.

I reinstalled system. DB restored copying data files into data folder whole database (I started to backup DB by copying data folder about 2 years ago with no problems).

I realized that some values in rows are being changed!

I am repairing crashed tables almost every day using mysql function or phpmyadmin.

I run DB on 7 yeas old SSD used at HP Z240 as a CAD machine.

Can someone help?

Windows 10, EasyPHP 14.1., Apache, phpMyAdmin, PHP and Python using MySQL. MySQL version 5.6.15. No issues with free space on drive.