technical support
noun [ U ] uk/ˌtek.nɪ.kəl səˈpɔːt/ us/ˌtek.nɪ.kəl səˈpɔːrt/
（有关如何使用计算机的）技术支持
an advice service provided, usually over the phone, to help people who have problems using a computer
We had to make five calls to technical support to get the computer working. 我们给技术支持部门打了5次电话才把计算机弄好。