Table_title: Releases Table_content: header: | Version | Start Date | End Date | row: | Version: Extended Security Update Year 2 | Microsoft Learn Windows Server 2008 R2 - Википедия
| Metric | Official MSDN Oct 2013 | Preactivated Oct 2013 “Better” | | :--- | :--- | :--- | | | Requires KMS/MAK key | Auto-activated (OEM BIOS mod) | | RAM usage (clean boot) | ~380 MB | ~375 MB (no activation service overhead) | | Windows Update behavior | Asks to check for 200+ updates | Users report disabling updates reliably | | Telemetry services | None | None (pre-2014 telemetry) | | Hyper-V integration | Works with Gen1 VMs | Works identically | | Installed patches | None (RTM + SP1 only) | Up to August 2013 rollups slipstreamed | windows server 2008 r2 sp1 preactivated enus oct 2013 better