How to connect mysql - OCTOPUS Microfinance Suite Octopus Micro Finance Suite

Your client software attempts to connect to a MySQL database instance on your local computer. There is no DB server running locally, hence the error.

Before reinstalling Windows, did you connect to a remote DB server or did you use a local instance?
In former case, you need to configure the DB connection to point to the remote serve. In the latter case, on top of Windows you also need to reinstall the MySQL DB server software locally, and it needs to be started.

You may go back mysql file to proper view applying mysql fix

http://www.mysql.fixtoolboxx.com

Try to remove or rename your existing connection file, QB creates a new one if it does not find any existing, allowing so to recover from broken files.

MySQL Repair

I think your MySQL Server databases got corrupt.
Try to remove or rename your existing connection file, creates a new one if it does not find any existing, allowing so to recover from broken files from the utilies below-

MySql Fix Toolbox provides easy ways of MySQL fix

Worried for Losing Data due to MySQL Corruption

uninstall Mysql then instal XAMPP it will work

is the post open to read the mySql Server data ?

To change the location where MySQL creates its socket file, do this:
1. Open your preferred text editor and create a plain text file.
2. Type this text (on two lines as shown):
[mysqld]
socket=/tmp/mysql.sock

3. Save the file as: /etc/my.cnf


To change the location where PHP looks for the socket file, follow these steps:
1. In Terminal: sudo cp /etc/php.ini.default /etc/php.ini
2. Open /etc/php.ini in your preferred text editor.
3. Find the [MySQL] section, and change the mysql.default_socket directive:
4. ; Default socket name for local MySQL connects. If empty, uses
5. the built-in
6. ; MySQL defaults.
7. mysql.default_socket = /var/mysql/mysql.sock
8. Change the permissions on /var/mysql so that www can read the socket, by executing this in Terminal:
sudo chmod 775 /var/mysql

An example of getting feedback from MySQL about a PHP problem -

mysql_connect("my.site.com", "username", "password")
This can also be done with this code -
die(mysql_error())

Each of the above lines will return the errors, if you have problems connecting to your MySQL database.
There are many more ways, this is just a taste.

When you install MySQL for the first time, no password is set for root user.
Move to the installation directory of mysql (cd/usr/local/mysql) Set the password for user, using the following command -
./bin/mysqladmin -u <username> password

Enter your password. Then you can connect to the mysql client as
./bin/mysql -u <username> -p <password>