if you didn't find the remote desktop, then I wouldn't worry about it, that means remote desktop wasn't installed. Usually if it is installed then when you click "My Computer" then "Properties" the "Remote Desktop" would be a TAB. Now, its time to up the stakes on your roommate. I want you to use "Windows Updates", and let it check for updates, once it has finished, under optional updates I want you to install "Windows Security Essentials" this is a free anti-virus and malware remover. This will scan and check anytime anyone attempts to attach to your pc. Also will remove any keyloggers, malware, etc.
I just updated Windows yesterday. I searched for the Security Essentials and will download and install after I shut down my other browsing windows. I need to bookmark a couple pages first. I'm going to do that in a few minutes. Will there be a conflict between Security Essentials and these: AVG, SbyBot, or MalwareBytes? Also, every time I reboot my computer in the last few days I've discovered that the Windows Firewall was shut off. It might be AVG doing that, but it worried me. Are there any logical explanations for that to happen?
wow, if your firewall is getting shutdown on reboot, then you have a malware on your computer. it shuts off the firewall in order to allow itself to get in (roommate), uninstall the avg and malware items you've mentioned and reboot until your pc restarts with the firewall turned on. If after that, the firewall still does come on when windows reboots, try to go to your control panel and security section and turn on windows firewall. If it still remains off when rebooting, then finish the security essentials install, and let it run a scan. With the firewall off, anyone can get onto your pc remotely and you would not know. If I did not know better after reading how you described your roomates behavior, I would almost definitely say he is aware of what is going on with your pc. Let me know how it works out after uninstalling avg and the spybot and malwarebytes, those programs the spybot and malwarebytes both have been recorded as creating issues.
Okay, I'm up early to take care of this before he gets up. I'll unload all that stuff and reboot, and recheck the firewall. If it stays on, I'll download the security essentials. and go from there. If it goes off again, I don't know if security essentials will help, since the other two did not detect the problem. But I'll start now.
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