“The system administrator has set policies to prevent this installation
Fix the local security policy.
Open Control Panel and go to Administrative Tools
In Administrative tools open Local Security Policy
Then in Local Security Policy right click Software Restriction Policies
and click “New Software Rectriction Policy
Now Left click on software restriction policies and in the right-hand window you should see enforcement
Double-click on enforcement and set the policy to apply to “ALL USERS EXCEPT LOCAL ADMINISTRATORS”
Now approve the changes and see if you are now able to install software.
For the icon issue yo can akso run SFC
Please run SFC (System File Checker)
Please run System File Checker sfc /scannow
... For more information on this tool see How To Use Sfc.exe To Repair System FilesNOTE for Vista/WIN 7 users..The command needs to be run from an Elevated Command Prompt.
Click Start, type cmd
into the Start/Search box,
in the list above and select 'Run as Administrator
You will need your operating system CD handy.
Open Windows Task Manager....by pressing CTRL+SHIFT+ESC
Then click File
.. then New Task(Run)
In the box that opens type sfc /scannow
......There is a space between c and /
Let it run and insert the CD when asked.