I'm not familiar with the AdMigrator utility. Can you try renaming your profile and restarting to make sure it is fully reset?
The AdMigrator utility is what's described in Tatiana's link. I tried renaming the profile and restarting CAD....dialogue box popped up saying it couldn't find the profile so it was going to create a default one. Well, the default profile it creates is just a standard CAD profile not a Civil3d one, now I can't get the Civil3D ribbon to show unless I select the renamed profile but then shortly after CAD crashes with fatal exception errors.....I just poked another hole in this sinking ship
I'm surprised that C3D did not create a functional profile. You should be able to restore your setup by deleting the new default profile and renaming your old one back to the default name. Make sure it is spelled exaclty the same.
If you use the link the admin tools, it will looks at the restart point like regular ACAD, but if close it and launch it again from your desktop icon you will get your Civil ribbons back.
Here is another way to reset your user settings:
For Windows XP
C:\Documents and Settings\<user name>\Application Data\Autodesk\C3D 2012
C:\Documents and Settings\<user name>\Local Settings\Application Data\Autodesk\C3D 2012
Looks like Im back to square one....default settings and a Civil3D ribbon but terrible lag when switching between layouts. So far no fatal errors though.
Glad to know I didn't trash your set up.
Rather then mess with your profiles, check to see that there are no shortcuts to folders or printers in your Plotter folder.
Here is a similar post on the issue:
This may not be related to the problem you are having but it is certainly something to check.
Layoutgenctl set to 1 and whipthread to 3. Deleted shortcuts to add a plotter wizard and plot style wizard, they were the only ones in the printer support paths. I was having pan and zoom lag in model space and paper space last week and resolved it by disabling multi-core support in BIOS and installing Civil3D SP1. Still having lag while switching layouts.
LAYOUTGENCTL 1 and WHIPTHREAD 3 fixes the lag while switching between model space and last layout viewed but it does not help for switching between layouts, or between model space and a layout not previously viewed.
Does anyone see a problem with the hardware:
Dell Precision T7500
Dual 64bit quad core Xeon E5603 @ 1.6GHz(I wanted faster but since AutoDesk didn't list min recommended speed for 64bit our IT department would not budge)
Firepro V5900 2GB onboard
4GB RAM (paid for 6GB but vendor didn't deliver that, IT is resolving)
It is interesting to me that when I view this thread it is marked as solved. I started the thread so I thought I was the only one that could accept an answer as a solution, which I have not done because the problem is still there (as at least one other user has verified). Does someone else have the power to mark the problem as solved? Was that you Tatiana? This issue is not solved.