PSSDiag 10.5.1.202 was available to download from the developer's website when we last checked. We cannot confirm if there is a free download of this software available. PSSDiag can be installed on 32-bit versions of Windows 7/8/10/11.
The program lies within Internet & Network Tools, more precisely Network Tools. The PSSDiag installer is commonly called DiagConfig.exe. We recommend checking the downloaded files with any free antivirus. This free tool was originally created by Microsoft. The most popular versions of the program are 10.5, 10.0 and 1.0.
From the developer:
PSSDiag is a diagnostic data collector for Microsoft SQL Server. It can simultaneously collect Perfmon/Sysmon logs, Profiler traces, event logs, SQLDIAG reports, and detailed blocking information. It is commonly used by Microsoft Product Support Services engineers to collect diagnostic data from end-user installations and can also be used by end-users to troubleshoot and monitor their own SQL Server installations.
You may want to check out more software, such as SQL Nexus, which might be similar to PSSDiag.