I updated from reader 8 to 9 and now pdf's are not opened anymore. The error is: access denied to vdk150.dll. I've tried to uninstall reader 8 but access is denied to all files in the reader 8 folder. I have administrator rights and still access is denied, even when I try to open a file in the reader 8 folder, or try to change a file attribute to get rid of the read only.
Reader 9 install went oke, but pdf's still impossible to read pdf's: access denied.