work of repairing and maintenance annual maintenance contract work of computer system and related equipments in the office of eudc-iii-1 annual and emergency maintenance of operating system with installed application software included java installation & configuration, dsc configuration, printer driver installation and sharing etc. on computer system for the period of 01-05-2023 to 31-03-2024. 2 annual and emergency maintenance of printer including replacement of printers teflon & all other parts & labour charge etc. for the period of 01-05-2023 to 31-03-2024. 3 annual and emergency maintenance of printer scanner / scanner including replacement & all other parts & labour charge etc.for the period of 01-05-2023 to 31-03-2024. 4 annual and emergency maintenance of laser printers cartridge including refilling work, drum, blade and all other parts etc. & labour charge etc. for the period of 01-05-2023 to 31-03-2024. 5 providing and installation of quick heal total security or equivalent anti-virus for security of desktop computer system for the period of 01-05-2023 to 31-03-2024.