i also had this problem, i managed to overcome it by changing the name of the file of .rar into .exe
to do this
1.locate the folder on your computer (for me its under games then downloads)
2. rightclick on folder and click properties
3. click the general tab then find the name of the folder from something.rar into something.exe
it worked for me although i do now have the problem that when i try to open the application it just closes it down again. i'm sorry if this dosen't help, but you can always try it!
