Hello,

As per the eligibility criteria laid out for UPSC, candidates need to have passed graduation in any discipline from a recognized university, those in the final year of the graduation too are eligible to apply, there is no specific aggregate required in this case,

now coming to your question, see qualifying UPSC isn't only about your choice of stream or subject in graduation, yes people belonging to humanities have an added advantage as there is considerable overlap with their graduation syllabus to that of general studies and optional subjects syllabus,

but if you have a look at this year or even previous year toppers they come from as diverse backgrounds as that of medical, engineering, science, commerce etc as well apart from humanities or arts graduate, it's all about strategies, focus, dedication much more than anything else, if you had already taken admission then there has been monetarily investment which you have to lose if you drop out, I would advise you not to do the same, you should analyze why you opted for computer science engineering in the first place, if it was your choice then what's causing problem now, is it you're not finding it interesting, or facing any issued in study, if so talk to your faculty for the same, try to delve deep in this matter before proceeding some where else, rest is your choice, evaluate everything and then only take decision.