Comment on Mistic Days by Stardeviant
Dude, I found that in 5 seconds by google... Anyway, answer's here : [link]
Quoting :
Q: I tried running the installer but it keeps telling me that my subsystem has been tampered with...help!
A: This occurs when you have attempted to apply a patch to system files such as uxtheme.dll. To remedy this (in 95% of all scenarios) you must open a command prompt (run as Administrator) and execute the following command: sfc /scannow. After it finishes you should be able to run the installer for the program with no issue. See Run as Adminstrator and SFC /SCANNON Command - System File Checker in Related Links at the top for more info
Quoting :
Q: I tried running the installer but it keeps telling me that my subsystem has been tampered with...help!
A: This occurs when you have attempted to apply a patch to system files such as uxtheme.dll. To remedy this (in 95% of all scenarios) you must open a command prompt (run as Administrator) and execute the following command: sfc /scannow. After it finishes you should be able to run the installer for the program with no issue. See Run as Adminstrator and SFC /SCANNON Command - System File Checker in Related Links at the top for more info
Thx 
. Sory but my english is very bad and i can't find this.
. Sory but my english is very bad and i can't find this.No problem 