Originally Posted by jrollins
Also why dont you have a simple email under 'contact' or 'help'; i have to join a forum just to ask aquestion?
It might be, because this is Open Source software, with developers located all around the Globe?
Do you want to call the UK? Germany? Australia?
To your base question: Upgrade.
Calibre must be fully closed/shut down (no tray Icon present).
Your Anti-Virus package may be blocking proper installation. Temporarily suspend it (Warning: use only distributions referenced from the official Calibre site.)
You failed to mention Which OS you were trying the install on (Each has it's quirks