Hidclass.sys – Pre Service Pack 2 Revision History for Windows Server 2008 R2 SP1, Windows 7 SP1 and Windows Small Business Server 2011 (SBS 2011)
24-Nov-2011 – 6.1.7601.21866 – Hidclass.sys – x86/x64 – http://support.microsoft.com/kb/2637924 – “0x00000050” Stop error when you disconnect a HID during the system startup process in Windows 7 or in Windows Server 2008 R2
Hidclass.sys – Pre Service Pack 3 Revision History for Windows Server 2008 SP2, Windows Vista SP2 and Windows Small Business Server 2008 (SBS 2008)
13-Aug-2009 – 6.0.6002.22198 – Hidclass.sys – x86/x64 – http://support.microsoft.com/kb/970694 – You receive a “Stop 0x00000050” error message after you enable or disable Bluetooth Enumerator in Device Manager on a Windows Vista or Windows Server 2008-based computer