fixed #1429. Don't use monotonic timer for Win32

libi2pd/RouterContext.h

@@ -137,7 +137,11 @@ namespace i2p
 			std::shared_ptr<i2p::crypto::CryptoKeyDecryptor> m_Decryptor;
 			uint64_t m_LastUpdateTime; // in seconds
 			bool m_AcceptsTunnels, m_IsFloodfill;
+#ifdef WIN32
+			uint64_t m_StartupTime = 0; // in seconds since epoch
+#else			
 			std::chrono::time_point<std::chrono::steady_clock> m_StartupTime;
+#endif
 			uint64_t m_BandwidthLimit; // allowed bandwidth
 			int m_ShareRatio;
 			RouterStatus m_Status;