Firstly, most game installations need a reboot, so try restarting.
Alternatively, you could just be clicking the install file icon, which will obviously try and get you to install/uninstall/Modify/etc.
Go to start menu, all programs and have a look around for deadrising, it should be in there, it might not be under dead rising but under the company name. (Cant think of who makes it atm)
If its not there check your C drive, then onto program files and see if its in there.
Once again if this doesnt work out your last option could be to reinstall but keep an eyeout this time for when the install finishes. (: