Hello Noelle, You shouldn't notice much difference, though some systems will be affected more than others. Providing you have a decent setup you shouldn't notice any difference at all. I've managed to put together the following based on a system with a Thinkpad X61 running Windows 7 SP1 Enterprise using BitLocker encryption. BitLocker is used for the actual encryption on Windows 8.1 / Windows 10 systems, but the algorithm is the same (AES). With a T7300 2.0GHz processor and Kingston V100 64gb SSD the results are: Sequential read: 243 MB/s (not encrypted) 140 MB/s (encrypted) Sequential write: 74.5 MB/s (not encrypted) 51 MB/s (encrypted) Random read: 176 MB/s (not encrypted) 100 MB/s (encrypted) Random write: Speeds are almost identical. In this particular scenario the processor is probably what causes the bottleneck, in the wild however the boot time is about the same. A cold launch of Opera 11.5 with 79 tabs remained the same (encrypted vs not encrypted): 4 seconds for all tabs to be opened. A small project build in Visual Studio 2010 took 2 seconds to load (encrypted / not encrypted). A larger build took 2 seconds (not encrypted) versus 5 seconds (encrypted). The hardware of the machine plays a huge part, especially the processor, RAM and whether or not you're using an SSD (which is much faster than a regular HDD). If the processor has hardware AES compilation this will also make a difference. I hope this helps Noelle.
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