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Why Windows 11 Pro is slow as a snail?

It seems that Microsoft employed BASIC at making the disk encryption

23.Oct.23 10:37 AM
By Shawn Highstraw
Photo Clipart


Why Windows 11 Pro is slow as a snail?
BitLocker disk encryption, available exclusively for Windows 11 Pro systems and often enabled by default, can result in a significant reduction in SSD performance, up to 45 percent, as reported by Tom's Hardware following their own testing.

Tom's Hardware conducted tests in three scenarios: without BitLocker encryption, with BitLocker's default software encryption in Windows 11 Pro, and with BitLocker's hardware encryption. They evaluated factors such as write and read speeds and latency. The results showed that software-based disk encryption led to an average 20 percent lower SSD performance in PCMark 10 benchmarks compared to hardware encryption and no encryption. In the CrystalDiskMark 8 random reading test, a similar performance difference was observed, but in the random writing test, software encryption exhibited a 45 percent drop in performance.

DiskBench and Atto Disk benchmarks also revealed significant reductions in SSD performance. However, in most cases, the SSD's performance was relatively similar to when no encryption was in use. The tests were conducted using a 4TB Samsung 990 Pro SSD, an Intel Core i9-12900K processor, and 32GB of DDR4 RAM.

Microsoft defaults to using software-based BitLocker disk encryption, a decision made in 2019 when the company chose to disregard hardware-based encryption in Windows and opted for software encryption. This decision was likely influenced by concerns that SSD manufacturers did not adequately secure their drives, making it relatively easy to bypass hardware encryption. By implementing software-level disk encryption, Microsoft maintains control over security.

However, this approach requires the CPU to decrypt and re-encrypt the entire drive. While Microsoft initially claimed that modern PCs have sufficient CPU power to perform software-based encryption without a noticeable performance impact, Tom's Hardware's testing suggests otherwise. Users looking to enable hardware encryption must reinstall Windows 11 Pro and use the Rufus tool to prevent automatic reactivation of software encryption during installation. It is also possible to completely disable disk encryption via a command prompt.

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