KACE Product Support

rem taskkill /F /IM iexplorer.exe

rem taskkill /F /IM iexplore.exe

rem taskkill /F /IM firefox.exe

rem taskkill /F /IM chrome.exe

rem taskkill /F /IM javaw.exe

rem taskkill /F /IM jqs.exe

rem taskkill /F /IM jusched.exe

rem taskkill /F /IM iexplorer.exe

The above lines will not do anything.. It will just show remarks...
By the way.. What is iexplorer.exe???

If you remove the word "rem" from each line then it will kill those process.. but it is not a good practice..
You should not terminate these generic processes forcefully as you like..
End user may do his critical work on any of the above processes.. If you terminate just like that all his work will be gone

Coming to uninstallation and installation section..

You are using /qn switch which will suppress basic ui as well.. if you want to check something, firt check with /qb as a trail.. If it goes without any issue then try with /qn

Are you running it as an online or offline script?  If you run it as an online and as logged in user they may not have rights to uninstall.

I nearly did all of my deployment via batch files attached and used with Managed Installations. There are a couple of things to keep in mind:

Always test the batch script outside of the K1. If the install doesn't go as planned, take the silent switches out and see what's going wrong.

Make sure the client computers have access to the files called in the batch script. I noticed that your script has the following line:

start /wait msiexec.exe /i jre1.7.0_11.msi /qn

Are you packaging the MSI in with the batch script using something along the lines of a zip file? If you are using a network share be sure to include the path to the share and also ensure that your client systems have access to said share.

Also as jagadeish said those REM lines are remarking out the lines so they are not doing anything. That's an awful lot of processes to kill  so you might consider running the script while no user is logged on.