I am struggling to patch adobe acrobat reader please recommend any alternative pdf editor with all features like (document sign, crop , merge, convert) OR a working method to patch adobe acrobat reader with all features. It would be really helpful.
You mean Adobe Acrobat. Adobe Reader is for reading PDF, Adobe Acrobat reads and edits it. If you just need a reader, I recommender Sumatra, itโs fast, light, and portable (doesnโt write to registry).
If you just wanted to read PDF then you can check Sumatra PDF that is light weight and Minimal design which is good for reading.
and if you want same features or functionality lie adobe you can try Foxit Reader.
If you need a more lightweight pdf reader then try PDF xchange editor, i ditched adobe and foxit for xchange due to its superior functionality, doc sign, security and editing.