I recently did a cvs migration. The following is a summary of the migration:
Original: winserver2003 x86 (32-bit)
new winserver 2012 x64 (64 bit)
install cvsnt,
cvstracNt (plug-in, provides a user interface for building cvs)
Copy the d:\cvsbase directory where the resource library is located and the Database directory under the cvstrac installation directory.
In the cvs control panel of the new machine, manually add all cvs repositories.
On 64-bit, the operating system user is not used, only the cvs user reports an error (the same is true on the Internet). So only use OS users.
1) delete the user using cvsrac (or in the CVSROOT\passwd file),
2) Create operating system users with the same name and password at the same time,
3) In the local policy|deny local login rule, add this user. This user cannot log in to the operating system.
4) Add the user to the resource library CVSROOT\writers file.