Is it feasible to crack ZIP passwords?

I have a piece of software I have to install on company laptops. The installer needs a serial to work properly, but I don't have it (my manager isn't here so I can't ask him). The installer tells me to ring a phone number which doesn't appear to be connected anymore.

I would download win32dasm and ollydbg and have a go at cracking the installer but I don't really have time and I haven't done it in years.

There is a zip file on the disc that looks like it contains all the program files but it is passworded. Is it feasible to crack this or will it take ages?

Solution 1:

As this is old software, it could be that it's using the old version of Winzip encryption - which is very crackable. A Google search will quickly turn something up.

Since Winzip v9, the encryption uses AES, which is secure.