I was having issues with adobe reader not working (v9.1), tried to uninstall and got error message access denied to HKEY_LOCAL_MACHINE\Software\Microsoft\Windows\CurrentVersion\Run\OptionalComponents\MSFS] , there are two other forlers in the same key, 3 all together MSFS, IMAIL, and MAPI. I tried to alter permissions to no avail. then, manually deleted all files , ran ccleaner. reg keys still exist, as they were not flagged by ccleaner and are preventing reinstall of adobe reader. I know other readers are available, but would like to resolve this issue. thanks.