I had the same problem. my desktop software did not have the handheld software installed. So it could not see the software on handheld. thus I could not install anything on the blackberry. although all other functions worked. the solution is to download the handheld os version you have on the berry from the net to the pc. click install. and now the next time you want to install from pc to the berry it should all work
Originally Posted by alslsb
I was having performance problems so I cleaned the event log, phone log, purges messages, internet cache, and deleted some 3rd party programs. Now my Blackberry 7520 with OS 4.1 is faster, but when I run the application loader, if says No System Software Found on Device and will not allow me to load any programs. Any ideas short of reinstalling everything???