Most online "free" links for Delphi 2021.10b or Autocom 2021.11 require you to disable your antivirus and Windows Defender to run keygens or patch files. This makes your PC highly vulnerable to trojans and ransomware.
The Delphi Group was a pioneering advisory firm in the Knowledge Management (KM) space, founded by Thomas Koulopoulos. It was acquired by . Their papers are often cited in Enterprise Content Management (ECM) and Information Architecture literature. delphi 202110b link
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Even with the correct Delphi 202110B link, some developers encounter problems: Most online "free" links for Delphi 2021
: You must disable your antivirus and firewall before installation, as these often flag diagnostic software files as false positives. delphi 202110b link