Failed to delete or copy DLL from GAC- Global Assembly Cache

Many times I try to delete file from GAC

Make the next instructions to solve this action:

1.     Open Regedit,

2.       Browse to HKLM\Software\Microsoft\Fusion.

3.       Add a REG_DWORD value named 'DisableCacheViewer'; set it to 1.

4.       Open an Explorer window and type in C:\WINDOWS\assembly\GAC_MSIL\

Open GAC (c:\windows\assembly\msil and copy the relevant file and remove
after finish change 'DisableCacheViewer' to 0

Good luck
Rami Heleg.