I cannot open any pdf. It says Abode Reader 8.1 has stopped working and needs to updated. I can get to the link to download updated version, but once it starts to install then I get a message saying "ERROR 1606.could not access network location %APPDATA%\." I have also tried repairing and uninstalling and keep getting the same error. Please help!! I have so much in pdf format!
Can you have a look at the following link, and see if that helps you. It discusses the solution and the cause for Error 1406.
Hope it comes handy in solving your issue.