BSOD when using RDP to connect to my WinXP MCE machine

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After like 3min of connecting from my other Windows system to my XP MCE machine via RDP, it BSODs with error codes c0000005 (0x77cd252b 0x0052f36c) and states that the Windows Subsystem Process (smss.exe) was closed unexpectedly. Does anyone know what's causing this and how do I prevent this from happening again? It used to run via RDP flawlessly until now...