Windows 95 build 90

Windows 95 build 90 (codenamed Microsoft Chicago) is a Milestone 5 build of Windows 95. It is mentioned in  from Windows 95 build 99.

[Cleanup.DelReg]
 * These were done as a temporary action for bld 90 when we changed detection
 * and registry stuff.
 * HKLM,Enum
 * HKLM,SYSTEM\CurrentControlSet\Services\Class