Multistar does not always host a public "one-click" download site for all older H.264 models. You can find compatible software through these sources: Official Support
Always save a copy of your working firmware (the version before the update) on a labeled USB drive. Keep it in a drawer next to your DVR. This simple step can save you days of downtime if an update ever goes wrong. multistar dvr h 264 software upd download
Official firmware is generally provided through the MultiStar Industry Co., Ltd. Download Page or specialized CCTV support portals. Multistar does not always host a public "one-click"
You may find original CD-ROM contents or manuals on the Internet Archive . Step 3: Perform the Update multistar dvr h 264 software upd download