Compared to Windows Server 2008 R2, \\tsclient access on our Windows Server 2012 R2 servers is incredibly slow (e.g. starting gvim from a local path takes ~80 secs compared to ~3 secs normally). Things I tried: 1) Used only TCP for RDP connections (server and client setting) 2) Turned off all offloading settings (Registry and/or NICs) 3) Connected from Windows 10 instead of Windows 7 (with RDP 6.3.9600) 4) Made sure Microsoft's Security Baseline is off (FIPS) 5) Swapped G200/MS display drivers 6) Tried all reasonable other client settings 7) Contacted Dell (system is up to date) 8) Contacted MS's "Professional" Support (don't make me talk about that...) Note: The Windows Server 2012 R2 server uses the same HW as a previously installed Windows Server 2008 R2. Note: The server's update history shows update 3003743; wusa tells me it's not currently installed. So I guess there's another update superseeding 3003743 (whose number I don't know); would like to uninstall the successor for a test. Note: The same behavior is prevalent when the machine is running as a VM in VMware ESXi 5.5 (just somewhat slower still). Note: No termsrv.dll patches/loaders are used. Note: All our Windows Server 2012 R2 servers expose this behavior. Any ideas are highly appreciated!