So you can use the full bandwidth of your connection!

During TCP/IP transfer, a certain amount of data needs to be confirmed upon reception before more can be sent. Stalling data confirmation results in delays and transfer-rate slowdowns, thus forcing the sender to wait. Especially for DSL and cable, it is possible to slow a download to a crawl by choking the upstream channel (which has the smaller bandwidth anyway) with an upload. This is because in such a scenario there is not enough upstream bandwidth left for data confirmation.

The standard solution so far has been to try and compensate for this by increasing TCP window size, thereby allowing more data to be sent without immediate confirmation. The main problem here is that this also leads to high ping times (latency) and significant delays during Webpage rendering. Latency of up to 2 seconds is not uncommon for TCP windows with a size of 512k. In short, huge window sizes just won't let you achieve full download speed.

- UDP checksum checking is now off by default.

- cFosSpeed queues now by default outgoing data for a maximum of 1 sec instead of 3 secs. This forces TCP to adjust to line conditions faster. You can change this settings by setting "spd gset max_queue_time -save", where is measured in milliseconds.

- Executables are now flagged to support Data Execution Prevention (DEP) and Address space layout randomization (ASLR), two security features of Windows and are now flagged to support 3GB of user space memory.