Using Windows Vista Home Premium 64-bit, I cannot map to network drives after connecting to my VPN (RSA). I receive an error "Logon Unsuccessful" (Windows is unable to logon. Be sure to check user name and password). These are correct. I experienced this previously and Dell was able to change some advanced settings which corrected the problem. However, I recently had to reinstall my operating system and Dell refuses to assist me again without a fee. Can anyone please provide me with detailed instructions on who to fix this problem? Event Viewer: Event ID 4648, Microsoft Window security - A logon was attempted using explicit credentials. My understanding is this has something to do with joining a domain. Thanks

Hi, Thanks for posting in Microsoft TechNet forums. As your are running Windows Vista Home Premium, please click start, type regedit and press Enter. Please navigate to KEY_LOCAL_MACHINE\SYSTEM\CurrentControlSet\Contro l\Lsa and set the value of Set LmCompatibilityLevel to 1. After that, Please type Local Security Policy from the start menu and press enter, then navigate to Local Policies->Security Options..->find the Policy Key named Network Security : LAN Manager Authentication Level and set the value to Send LM and NTLM responces. Best Regards Magon Liu TechNet Subscriber Support in forum. If you have any feedback on our support, please contact tngfb@microsoft.com Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

I'm unable to find the Local Security Policy by searching from the start menu to change the LAN Manager Authentication Level. Is there another way to locate this? Thank You Jennifer

Hi Jennifer, Click start, type Local Security Policy and press enter, you will get it. Regards,Please remember to click Mark as Answer on the post that helps you, and to click Unmark as Answer if a marked post does not actually answer your question. This can be beneficial to other community members reading the thread.

Dell had to replace my Laptop which was running Windows Vista Home Premium 64-bit and my replacement machine running Windows 7 Home Premium and experiencing the same problem mapping to my network drives. I have tried to follow the steps above, but I can't find the "LmCompatibilityLevel". Could you please assist me in correcting this problem? Thank you, Jennifer