HCL Infosystems Limited has opened a special window for the transfer and dematerialization of physical shares until February 4, 2027.This facility is for shares bought or sold prior to April 1, 2019, and requires the original security certificate.Securities transferred through this window will be credited to a demat account and locked for one year.Shareholders can contact the company's Registrar and Share Transfer Agents, M/s Alankit Assignments Limited, for assistance.