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About Narayana Charan
Expertise
I can answer questions for Windows 98,2000,XP,2000 Server,2003 Server, Exchange 2003, Exchange 2007, DNS Servers, IIS, DHCP and WINS. Apart from these i have good knowledge in Windows 2003 Active Directory Management, Sites and Services, Recovery Solutions, Anti virus issues, Backup related, Trust Relation Ships, Permissions and security related, FMSO Roles, Global Catalog Server related, Preparation of AD for Exchange Installation, Domain and Forest management, Infrastructure Management, Outlook and Questions related to Routing and Connection issues etc. you can feel free ask me in these areas at any time. I hope i can perform better solve your problems.

Experience
I have a total of 5 years of Experience in this area.
 
   

You are here:  Experts > Computing/Technology > Focus on Windows 2000/NT > Windows Networking > security

Windows Networking - security


Expert: Narayana Charan - 7/17/2008

Question
when I want to use sharing and security and set the permissions for users who access a folder over the network the SECURITY alert appears with this message: Unable to display the user selection dialog. (null)
Please let me how to solve this problem.

Answer
Hi Abbas Mahlouji,

How are you doing? please check your riched32.dll file in system32 directory. it must be 3.5KB and you can copy from original xp cd-rom.

I hope this is informative for you i would like to thank you for asking me this question.

Thanks & Regards,
Narayana Charan.B
India.

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