Sounds like a stressful situation, I can totally understand, I've been there...The fact that the RRAS service couldn't stop cleanly and led to a crash is a major clue that something became corrupted in its state or a dependent component.Let's work through this methodically. The goal is to first get a clear picture of what happened, then work towards a safe recovery.
Here are the key steps I would recommend:
1. Diagnose the Blue Screen (The Root Cause):
The most critical file is the memory dump. Navigate to C:\Windows and look for a file called MEMORY.DMP (a large file) or smaller files in the C:\Windows\Minidump folder.
Analyzing this dump file will tell us exactly what driver or process caused the crash. You can use the Windows Debugger (WinDbg) tool to open it, or if that's outside your comfort zone, the basic details from the Reliability Monitor (search for "View reliability history" in the Start Menu) can sometimes point to the faulty component.
2. Assess RRAS Configuration Corruption:
The RRAS configuration might be damaged. Let's first try to reset it. Open an Administrative Command Prompt and run:
netsh ras set trace * disabled
This command disables any deep-level tracing that might be interfering. Then, try starting the "Remote Access Management" service again from Services.msc.
3. The Nuclear Option (if all else fails):
If the service still refuses to start, the most reliable path is often to reconfigure RRAS from scratch. The configuration itself is likely the problem.
You can completely remove and reinstall the RRAS role through Server Manager. Don't worry—this doesn't remove the Hyper-V role itself, just the RRAS configuration. You will need to reconfigure your NAT and routing rules, so please ensure you have your previous settings documented.
My strong suggestion is to start with Step 1. Identifying the blue screen cause is crucial; otherwise, the problem might just happen again.