Now a days its very important to keep your security system strong enough because you might share your laptop with your friends or another user so they can insatall application their own even it can be virus as well so

how to avoid unwanted software installation from another user

to go with above excersise you need to follow some steps as shown in the image.

avoid unwanted software installation from another user

Step 1:-Go to the control panel.

avoid unwanted software installation from another user

Step 2:-Then click on System and Security option.

avoid unwanted software installation from another user

Step 3:-Then Choose Administrative Tool.

avoid unwanted software installation from another user

Step 4:-Click on the Local user policy.

avoid unwanted software installation from another user

Step 5:-Then click on Local policies.

avoid unwanted software installation from another user

Step 6:-Then click on Security Options.

avoid unwanted software installation from another user

Step 7:-Click on this Option for making changes in Admin approval.

avoid unwanted software installation from another user

Step 8:-Select the above Option then click apply and ok.

avoid unwanted software installation from another user

Step 9:-The select the second option from behavior of evaluation for making changes in standard user.

avoid unwanted software installation from another user

Step 10:-Then choose the above option and click on apply and ok.

avoid unwanted software installation from another user

Step 11:-Now try to install any application setup file.