20.exe/12.exe/kill.exe = Virus?

Ok, so ever since 13th October (exactly 1 week ago) I've been noticing something weird going on, on my laptop. My anti-virus (McAfee) notified me that some program tried to run, if I recall, I believe it was 20.exe. Anyways, soon after that day, I had another notification poped up, but it was by windows administrator authorization thing. It said that some file needed my authorization to continue, and the file location was system32. But I pressed cancle.

Right after those 2 incidents, I quickly ran a full scan with McAfee, but it didn't find anything. About 2 days after, windows administrator authorization thing came up again, so now I'm starting to get worried. Then I remembered that McAfee notified me about 20.exe, I went to my search bar in the my computer and looked it up. I found the location of the 20.exe. I went there, and I found other multiple folder with similar name to the folder that the 20.exe was in. The name of the folder were tmp___ (random letters/numbers) And in those folders, there were either a kill.exe or a 20.exe in them. I tried to delete all of them, but one of the folders said that I needed the administrator authorization to delete it. Well guess what? I'm the only admin/person that's using this laptop. I asked one of my friends that knew about computers and he suggested some virus removers. One of them was Spybot - Search & Destroy. I quickly downloaded that and ran a scan. It didn't find any virus or anything, just more cookies, but after I pressed the fix problems/etc. I went back to the location of the 20.exe, and in those folders, there were no more 20.exe/kill.exe.
Also, forgot to add this but, when I looked at the date/description of the 20.exe/kill.exe. It had random letters for description like jklshfjklsd, and the date that it was made/modified/ran were on 13,14, so on. The time was random during the day. I usually leave my computer on sleep mode and the screen is spose to be black until you turn in on again right? But when I open up my laptop, the log in screen was already there. (I turn my laptop screen down btw) and when I went to the folder that the exe was in, it was ran/made when my computer came back from sleep mode.

Today (20th October), the same thing came up again, with the windows notification. I ran the scan, removed it again. But.. this time, there was a 12.exe, this is the first time I've seen this ever since 13th Oct, I read the description and it was 'onganei'. I'm not sure if that's spose to be random or not. And then in another folder with a kill.exe (I think), the descrption said 'Service Updater' and it also had a red fire type torch thing as a file icon. About 30mins after I resumed my laptop from sleep mode and the scan was finished, I pressed remove, went back to the folder location, and the 12.exe was still there. I tried to remove it but it said it was still running. I went to Task Manager and pressed 'End Process' then I removed it. About 5 mins after that, I went to my McAfee settings to see the file permission, and in the permission list, it had 12.exe as 'Outgoing' and I didn't add it there. So I'm not sure what's going on here

Btw, these files keeps coming back every day. I havn't had these notifications until the 13th of October, that was when I started playing Vindictus (MMORPG) It was open beta, so they had to update the client/folders, etc. I'm not sure if it's the game or not. But I've been playing this game everyday.

Also, sorry for wall of text. And if it's in the wrong section, could a moderator move it? I'm still new

Thank you in advance. I'm really worried about my laptop, it's fairly new atm and quite expensive. And I've never gotten a virus on my computers before.