OS: Windows 8
My problem all started when I was playing a game on my computer.I was playing in fullscreen mode and my game suddenly minimized. A console application then showed up with the title "tsksch.exe" it then disappeared too quickly for me to read any of the other text in the application. Immediately after that another console application appeared but then disappeared too quickly for me to read. I found this strange so I did a full system scan with AVG. It came up with one "Malsign.Opencandy.7AF" and one "Malsign.Generic.5BB" it removed them without problem. A few hours later I decided to do another scan to make sure that everything was all clear. So I set AVG to do a full system scan and I also selected the Scan Archives and Thorough Scan options. This scan came up with 6 threats, there was one "Malsign.Generic.EE6" and six "Corrupted executable files" it removed all of them without problem.
I then noticed the next day that my computer was facing severe slowdowns (most common just after startup). I opened the task manager and noticed that "svchost.exe" was consuming a lot of memory and slowing down my computer. I had noticed that it would only do it periodically. Sometimes it would consume massive amounts of memory (I can't remember the exact amounts) and other times it would consume a normal amount. This meant that sometimes my computer would slow down for a few minutes but then would speed back up after a little while. Also, over the past couple of weeks I have noticed that my computer shuts down much slower than usual. Just today I had a shut down that took approximately three minutes to complete. I have also noticed that CTRL ALT DEL doesn't always work, and I have to press it multiple times to get the screen to show up, and even then I have to click on the "Open Task Manager" link at least twice to get it to open.
Just last night I had noticed while in my internet browser that another console app. had popped up before promptly closing. I can't remember it exactly but the title of this one was something like "Delldatalocalbackup.exe". So this morning I decided to get malwarebytes to ensure that my computer was still not infected(because I was still experiencing strange behavior). So I did a full system scan, it came up with four "Trojan.Agent.GNI". They were removed without issue.
My question is, am I still infected, and is the behavior that I have experienced normal or suspicious?
(If more details are needed, just let me know.)