During upgrade mysql with mysql-installer-web-community-188.8.131.52, I cannot start Mysql server. It fails with error:
The system cannot find the files specified
Mysql service has invalid path.
Open windows services (Start->run ->Services.MSC)
Find service with name "Mysql Server" and check path, it should be something like that:
"C:\Program Files (x86)\Parallels\Plesk\Databases\MySQL51\bin\mysqld.exe" "--defaults-file=C:\Program Files (x86)\Parallels\Plesk\Databases\MySQL\Data\my.ini" MySQL
Make sure that Mysql folder and executable file mentioned above exist by this path.