The KB [FIX: Performance decreases after you move a large report to SQL Server 2008 R2 Reporting Services][1]. Maybe a trying a workaround mentioned in the BK > Optimize the pagination for the report > when you design the report. Don't have R2 instance and time currently available to play with it.
Still running Windows 7 or Server 2008 R2 on production But this time they went too far. Yesterday, January 9, 2019 Microsoft released a security (important) update, KB4480970 for Windows 7 enviroment. Windows 7 environment also include Server 2008 R2. Such update, far from fixing problems, caused a mayor issue to Server Message Block (SMBv2) protocol. Microsoft Windows Server 2008 R2 Enterprise - Media - 25 Windows Server 2008 R2 is the robust Windows Server operating system to date. With built-in, enhanced web capabilities and included virtualization technology, Windows Server 2008 R2 Standard is designed to increase the reliability and flexibility of your server infrastructure while helping save time …
Customers who use Windows Server 2008 or Windows Server 2008 R2 products and services should migrate to Microsoft Azure to take advantage of 3 additional years of Critical and Important security updates at no additional charge and modernize when ready. For environments other than Azure, we recommend customers upgrade to the latest version before the deadline.
Apr 16, 2013 Mastering Microsoft Windows Server 2008 R2: Minasi, Mark Feb 02, 2010 Microsoft® Update Catalog
Windows Server 2008 R2 is a server operating system and the fourth release of Windows Server produced by Microsoft as part of the Windows NT family of operating systems. It was released to OEM hardware partners on July 22, 2009 and became generally available on October 22, that year.
Time for Windows server 2008 and NTP | Niall Best's Blog Apr 02, 2011 Configuring NTP on Windows 2008 R2 | Sysadmin Lab Jul 12, 2010 Windows Server 2008 R2 - Wikipedia