While I was trying to access my desktop through my laptop on the same network i found following error:
“You cannot initiate a Remote Desktop Connection because the Windows logon software on the remote computer has been replaced by incompatible software MrvGINA.dll.
To correct this problem, please have the administrator of the remote computer contact the program vendor for a version that is compatible with Windows.”
This MrvGINA.dll get updated due to NetGear software installation. I found solution for this issue on the following link.
http://www.dougknox.com/xp/scripts_desc/fix_xp_logon.htm
Try it!