PestBlock 4.1.7 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. The actual developer of the software is PrivacyAnywhere Software.
The program lies within Security Tools, more precisely Privacy. PestBlock.exe is the most common filename for this program's installer. We recommend checking the downloaded files with any free antivirus. The most popular versions among PestBlock users are 4.1, 3.2 and 2.4.
From the developer:
PestBlock lets you protect your privacy and your computer from a variety of spyware and unwanted programs, from those that expose your confidential information, to those that diminish the performance of your computer. It also detects programs that pop up advertising on your computer and cookies that may contain personal information.
You may want to check out more software, such as CleanMantra, FraudLabs Desktop or PowerPoint Key, which might be similar to PestBlock.