csrss.exe isn't a virus, nor anything dangerous. It should be on your pc, and if it isn't, there's probably something wrong. However, this does not mean that it cannot be harmless at all though. This file should be located in your windows\System32 - if it isn't in that specified folder (gone or located somewhere else) then, yes indeed, you have a problem.
nvvsvc.exe isn't a virus and shouldn't be causing problems. It's used by Nvidia and, unless it's eating up your CPU, you should just leave it be.
So should be the nvxdsync.exe
winlogon.exe is the same as the first and should be located in said folder, if it's not - you have problems.
If you want to avoid most malware stuff and not run extensive virusscans and crap, just install malware anti-malwarebytes and run it every now and then with a quick scan, a full scan every month. I use the quick scan every time before i do online banking.
I do not use any other virusscan, no problems so far after all this time. You do have to know what and what not to click upon the nets though.. for those watching pron, find a trustworthy website. Oh and get AdBlock, though if you watch streams like twitch.tv, they won't thank you for that.
CCleaner is useful too.
P.s.: I think she just wants to get you on raidcall, because, obviously if the solution was there it could've been sent by mail.