I am a class 12th student with PCM & don't want to study PCM after 12th. I am interested in computers. Can you suggest some colleges for it?

Each country has got its own validations with respect to educational qualifications. I do not know about the institute you are referring but in general, Diploma courses offered in India cater to the Indian scenario where many of the employers are keen about the skills and not about any certification from a university or governing body or government of India. Several thousands of professionals in India have studied in many reputed institutes and are into successful careers. But institutes offer the diplomas on their own. So, these Diplomas may not be valid in another country for the purpose of higher education or employment. Please check out with the institute directly and also check with Malaysian education agency whether it is valid in your country.