Quick answer: Anti-virus software may falsely detect the Liquid Notes installation package as a harmful file, and consequently block the installation in full or part.
Using anti-virus programs at installation of softwareAnti-virus programs are designed to detect malware intrusions and keep your computer protected from virus, trojans, etc. which often are delivered in emails or malicious file downloads. Consequently, they tend to be rather aggressive towards files that are yet unknown to them.
A release of a new software by a company as ours thus might be wrongly detected as a 'harmful file' by your anti-virus program. This is why we ask you to temporarily disable your anti-virus software to ensure the installation succeeds in full without any errors being reported.
Once the installation of Liquid Notes is completed, you should turn on your anti-virus again. You may also want to run a virus scan of your hard drive to be 100% confident your system is ok.
This procedure is recommended by most companies developing software for desktop use.