I did a scan and found that port 515 is opened and that it's linked to the lpdw0rm and ramen trojan. So, how would I close the port and remove the trojans?

I suggest you post a HijackThis log for examination.
A member of the HijackThis Team will walk you through, step by step, how to disinfect your computer.
Once you post your log, don't make any changes to your system, as that could change the results of the posted log, making it difficult to properly clean your system.

Read Preparation Guide for use before posting a HijackThis Log.
Please read, and follow, all directions carefully!!!

Then, run a log, and post it in the HijackThis forum, at this link. Do not, fix anything, yet.
A member, of the HJT Team, will help you out.
It may take a while to get a response, because the HJT Team are very busy. Please, be patient, as these people are volunteers. They will help you out, as soon as possible.

NOTE:
Once you have made the post, please, DO NOT make another post in the HJT forum, until it has been responded to by a member of the HJT Team. The first thing they look for, when looking for logs to reply to, is 0 replies. If you make another post, there will be 1 reply. The team member, glancing over the replies, might assume someone is already helping you out, and will not respond. So, just make your post, and let it sit there, until a team member responds. This way you will be taken care of, in the most timely manner.