The original Windows Task Manager was 80 KB in size, while its current version is 4 MB. Dave Plummer designed it to remain operational during system freezes, emphasizing that every line of code has a cost. The Task Manager could manage multiple instances by sending private messages to existing ones and launching new instances if the original was unresponsive. It utilized global strings and direct access to the kernel’s process table for speed and efficiency. Users have noted that modern systems consume more resources for similar tasks compared to older versions like Windows 7.