Error establishing a database connection at localhost
Posted by: chadbiggs (
Date: January 04, 2023 08:51PM

Wampserver 3 v3.0.4
Apache 2.4.18
PHP 7.0.4
MySQL 5.7.11
Green Wampserver icon in tray

Error: Error establishing a database connection
I receive this error on all wordpress folders in www folder.

I have been sick and have not opened Wamp for over a year. Since then, I upgraded to Windows 10.

Upon trying to open Wamp, I could not get Apache to work. I changed World Wide Web Publishing Service to manual in services.msc and was able to get Apache working. I now have a green icon in the tray.

When I click on localhost from the wamp icon it takes me to Windows IIS page and the address bar states that I am at localhost.

I am able to log into phpMyAdmin and see all my databases. I can see all my folders when I click on wwwdirectory.

I simply cannot connect any of my website databases from localhost.

I use Windows defender antivirus and I use windows firewall.
Wamp is installed at C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Wampserver32

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Re: Error establishing a database connection at localhost
Posted by: Otomatic (Moderator)
Date: January 05, 2023 08:51AM


The switch to Windows 10 did not automatically perform the installation of redistributable VC++, so :

- Verify that all VC ++ packages are installed and with the latest versions.
To do this, use the tool:
Checks VC++ packages installed
Do not use a previously loaded tool. Make a new download to make sure you are using the correct version.
To download missing packages, do not rely on Microsoft links, they are not reliable, download packages on in section Visual C++ Redistribuable Packages
Do not forget that if you have a 64 bit Windows, you must install both 32 and 64 bit versions of each package.
You must install each package "as an administrator", so right-click the exe file and then run as Administrator.

Before applying the 3.3.0 update, it is necessary to perform some manipulations:
- Apply items 04 and 08 of TROUBLESHOOTING TIPS
- Install PHP 7.4.33
- Do PHP 7.4.33 for Wampserver scripts:
-- Edit wampmanager.conf to have:
phpCliVersion = "7.4.33"
then save it

- Apply Update 3.3.0 to your version of Wampserver
Wampserver update 3.3.0

> Wamp is installed at C:\ProgramData\Microsoft\Windows\Start Menu\Programs\Wampserver32
No. It the shortcut

Documentation Apache - Documentation PHP - Documentation MySQL - Wampserver install files & addons

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