When attempting a checkout with "write protection" option from the CVS repository, I get the following error in a dialog box:
Trouble launching the CVS process:
"C:\Program Files (x86)\CVSNT\cvs.exe" edit -z
On folder [some_path]
The handle is invalid.
I'm running TortoiseCVS version 1.12.5 (with CVSNT 2.5.05) on Windows 7 64Bit.
Do you get the same error if you run the command from the command line?