I have few PCs and all of a sudden users with admin Privileges on these PCs are getting black screen are logging on. I di the following:
1- Ran Malaware byte
2- Ran scan disk
3- Update all patches
4- Checked the registry key under HKEY_LOCAL_MACHINE\Software\Microsoft\Windows NT\CurrentVersion\Winlogon\Shell then recreate the Shell key as a REG_SZ key, with the value explorer.exe.
5- The only way to start again is to end the explorer process and start it as a new task.
Any ideas will be appreciated