Hello guys, I got this problem some months ago with Shoot the Bullet and today I got the same problem with Imperashable Night and UFO.
Well, it happens when I click to open the vpatch.exe in the game folder. Instead of opening the game, it shows a windows popup error saying that it can't find 'vpatch.exe', then the vpatch.exe that I double-clicked disappears from my folder.
I tried to open other .exe files to see if there is some virus in my computer but they open normally, except if they are the 'vpatch.exe'. If I try to open other vpatch.exe, it will show the same error and delete the *.exe.
Also I can't extract the vpatch.exe for while, when I extract all files from the Vpatch_pack.rar it extracts everything (txts and dlls) but it doesn't extract the vpatch executable. Later I'll try to restart the computer and see if this problem persists. Do you guys have seen something like this before?