These errors actually show up when you try to install the software and may read 'Constrained by Certificate, contact Supplier' or 'Certificate error'. However these errors can be solved by an easy but long process. Here is a quick guide on how to solve the certificate error:
STEP 1: Goto www.s60certkey.com and register. Its free. They will ask for your email and IMEI number. Dial *#06# to know your IMEI number.
STEP 2: After registration they will send you an email within 12 hours. Dont forget to check your inbox AND your spam folder.
STEP 3: After you recieve the email from them goto their site again and login. You will see that there will be two files waiting for you, CER and KEY. They will be about 5 kb in size. Download both of them.
STEP 4: Download this software called the Free signer. You can download it easily based on your symbian version.
STEP 5: Install Free Signer and in settings give the path of the certificate and Key that you have download.
STEP 6: Now select "Add task" from Free Signer and select the software which shows certificate error. After that select "Sign Sis" from the options.
After the process a new file with "signed" written in the end of it will be created, you are now free to install that file.!
