Installation is not required in using Samurai. The program is a standalone executable. Upon executing Samurai.exe, the following files are created in the directory where you launched the program: samurai.cnt, samurai.hlp, urlhelp.dll and systrayhook.exe.
Systrayhook.exe is installed as a service in Windows and this will install whether you use or not any available security solutions by the program. Samurai will work for Windows NT, Windows 2000 and XP. It will work also in Windows Vista and Windows 7 by running it with administrator privileges but these OS are not officially supported.
Note that the samurai.exe is flagged with risk by some anti-malware scanner as suspicious, unwanted or trojan
. I believe it's false positive. The author of the program need to clear detection by the scanners. I scanned the system that has Samurai files and configuration in place during this review using Malwarebytes, SUPERAntiSpyware, A-squared, Spybot-S&D, The Cleaner, Windows Defender and Ad-Aware 2010 but all of these scanners found no risk or infection. Scanning using standalone rootkit scanners gave 0 infection.