JPCSP Launcher [v1.8.0.4]

[hyakki]

Is it normal to be getting a malicious virus warning when trying to download this?

If you downloaded it from here it should be safe, I don't release the launcher anywhere else, so it's probably a false positive, usually cheap off brand (acting like they catch more then the big brands) or overly protective av give these false detections
http://en.wikipedia.org/wiki/Antivirus_s..._positives

if the error message is from the program itself when you try to run it, then something tried to modify the exe and it failed the internal hash checks, that could mean a number of things like a hard drive that's corrupting files, a virus already present in your system that modifies exe programs, bad ram.