This shimeji has been tested in four computers, all of them had windows 7 and two of them were 32bit based, whereas the other two were 64bit based. The Mischievous version will do all the above, but can also mess with your windows by grabing them and throwing them away! they can also multiply until there's a lot of them all over your desktop! (if you give them enough time of course). The calm version will simply be there in your desktop, walking or running around, climbing windows or the screen, sitting, laying there and stuff. What's the difference between the Calm and the Mischievous version?: rar, go to 'Sans shimeji' and choose any of the two versions available, 'calm' or 'mischievous', then take that specific folder and unpack it anywhere in your computer (no installation neccesary, you can change the name of the folder to anything you want later), then open it and double click the 'Shimeji-ee.jar' and that's it!
You also require to have either Winrar, winzip or any other compressing program to unpack the files You NEED to have installed the lastest version of Java in your computer, you can download it here