So I was trying to update some files at home off the work CVS and I get “Trouble starting the CVS process: The handle is invalid”. I also kept getting these AVG errors on my CVSNT files saying they were infected with a trojan, but after doing some research, it is apparently a known issue with AVG and is just a false positive. All I did was exclude the CVSNT and TortoiseCVS folders from AVG and presto! worky worky =) AVG, you need to fix this. STAT!