Multiple repetitive ArcSOC crashes on boot every day

[AA8]

When I start my PC every day I get an ArcSOC crash for every service I have on my server (the Visual Studio do you want to attach a debugger dialog pops up for each one). The log has nothing useful in it and just says the process for the service has crashed:

[ATTACH=CONFIG]22507[/ATTACH]

I'm running a Windows 7 x64 Professional SP1 with ArcGIS Server 10.1.

After the crashes everything then works OK, I can use the services without problems until I next boot up.

[AA8]

It's crashing in the AppInitializer DLL calling RegisterJavaExtensions. It makes a call into MSVCR90.DLL (a string copy) and crashes. Same line every time.

Any ideas how to solve this? I've tried repairing the ArcGISServer install and re-installing the MS VC++ redistributables.