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Installing new programs or upgrading an existing program can occasionally cause computer problems. It is a good idea to upgrade a program only if you really need or want the new features in the upgrade or are having problems with an older version, not just because it is the latest and greatest version.
If you do install new software, always make sure that no other application is running before you start the installation. If an application is running, then a system file may be locked that the new program needs to update and you may run into problems. It is also good practice to restart the computer before you re-install the new software, then restart again after the new software has been installed.
Removing software on a Macintosh computer. Under Finder click Go, then Applications. Find the software you want to remove and drag it to your trash.
Removing software on a Windows computer. You should uninstall an application, rather than dragging it to the Recycle Bin.
Windows 7 - Click Start, then Control Panel then Programs and Features.
Windows 10 - In the search box type in Control Panel then choose Programs and Features.
Highlight the program you wish to remove, then click the Uninstall button. If a message appears that refers to deleting shared files, always keep the file or files. Do not delete them.
If you start installing a program, but before the installation process is complete you decide to cancel the installation, click Cancel. Do not just close the window. Clicking Cancel will clear your computer of any files that may have been installed before you cancelled the operation; if you close the installation window, files may be left on your computer that could cause problems.