Criticism of Windows Vista including Photoshop and WinRAR, also performed worse under Vista. Many low-to-mid-end machines that come with Windows Vista pre-installed suffer from exceptionally slow performance with the default Vista settings that come pre-loaded, and laptop manufacturers have offered to "downgrade" laptops to Windows XP—for a price. However, this "price" is unnecessary, as Microsoft allows users of Windows Vista and Windows 7 to freely "downgrade" their software by installing XP and then phoning a Microsoft representative for a new product key. When first released in November 2006, Vista performed file operations such as copying and deletion more slowly than other operating systems. Large
Technical features new to Windows Vista even those that do not explicitly use QoS APIs. Windows Vista includes in-built support for peer-to-peer networks and SMB 2.0. For improved network security, Windows Vista supports for 256-bit and 384-bit Diffie-Hellman (DH) algorithms, as well as for 128-bit, 192-bit and 256-bit Advanced Encryption Standard (AES) is included in the network stack itself, while integrating IPsec with Windows Firewall. Windows Vista introduces an overhaul of the previous Windows NT operating system loader architecture NTLDR. Used by versions of Windows NT since its inception with Windows NT 3.1, NTLDR has been completely replaced with a new architecture designed to address modern