Cracks

Software cracking is the modification of software to remove protection methods: copy protection, trial/demo version, serial numbers, hardware key, date checks, CD check, or software annoyances like nag screens and adware.

Protection methods, like serial numbers, are a basic confirmation that you own the software. When you install the application or reach the end of a trial period, you will be asked to enter this serial number. Cracks are able to bypass this system. However, the distribution and use of cracked copies is illegal in almost every developed country, while cracks themselves have been known to contain numerous parasites and infections.