Troubleshooting desktop hardware and software issues.
Updating the operating system on desktops and laptops.
Installing software on desktops and laptops.
Removing viruses and spyware from desktops and laptops.
Setting up network connections on desktops and laptops.
Connecting desktops and laptops to printers.
Resolving printer issues.
Helping the network admins as needed.
Sometimes answering help desk calls.
Configuring and troubleshooting connections between desktops/laptops and mid-range or mainframe computers.
Sometimes providing informal or formal training to users on how to use computer hardware or software.