Originally posted by Kammmmi
Don't worry about csrss.exe or svchost.exe...
Svchost is a process that runs on your computer that can host (contain) other services that Windows uses (for example, Windows Defender is hosted by svchost), think of it as just a generic name, and its perfectly normal to have multiple of them running.
Csrss is the Client Server Runtime Process, its also made by Microsoft and is natively found on Windows. Its used for basic stuff (console windows, managing threads, and other critical functions). There are a few viruses that share the same name, but you could check if its in the System32 folder (because that's where the good csrss is stored) if you really wanted to be certain that its good.
What I think has happened here, is that people on certain websites (namely websites that are filled with script kiddies running around with RATs) get very preoccupied with small security details, and become convinced that everything is malware. Don't get me wrong, its good to be cautious, but I think this is probably a case of being overcautious. As long as you have a single, good antivirus installed (I like Malwarebytes, but to each is own) and a single, good firewall (if you're behind a router, you should be fine with the default Windows Firewall) you're probably safe from a majority of what's out there. Just remember to scan files on a site like VirusTotal before you execute them, and run them Sandboxed if its really a concern.
To address your webcam issue, what you really ought to do is restart your computer, unplug and replug any cables that might be related to your webcam, install/update necessary drivers, get the latest version of the program you are using, and if it still doesn't work, try to find an error code or enter a diagnostics menu specific to the webcam. If that fails, I'd suggest you go back to the manufacturer/distributor and ask them.