Yesterday I started experiencing slow computer performance while playing games. The game in question is COD: Modern Warfare 2, which is the first game I noticed with significant or noticeable performance degradation. The graphics were constantly stuttering and the game feels choppy, although not totally unplayable. It hasn't done this before. Initially I thought it was a latency issue, but then it also happens in single player or private lobbies when I am the only player and the host. I've tested my internet speed with speedtest and pingtest and everything turns out perfect. I then tried other games like Starcraft 2 (works fine without said stuttering), COD: Modern Warfare 3 (works fine without said stuttering).
Then I started COD: Black Ops 2, and to my horror, the stuttering was very evident, even in the menus (where the globe is spinning, check youtube to see what I mean) and even in-game (custom games with me as the host and NO players). Torchlight 2 also experienced slight graphic performance degradation.
I've tried lowering graphic settings to the lowest and the stuttering still happens. Also, I've checked the framerates and they are good (above 60 fps) so my GPU and CPU should be fine. It was then I read somewhere that McAfee might be the cause so I experimented by turning off OAS and Firewall, guess what? Voila, all games now work at full speed again like before. I then turned on Firewall again and it doesn't affect gameplay. Finally I turned on OAS (On-Access Scanner) and the stuttering returns.
So now I can safely pinpoint that OAS is slowing things down, right? I've also experimented by changing the OAS settings under "Choose how thoroughly to scan my PC (Advanced)". I noticed that the setting (before I changed it) was "Strike a balance between the scan thoroughness and my PC's speed (Recommended)", so I changed it to "Minimize the effect on my PC's speed, even the scan is less thorough", and this current setting is working fine for me at the moment, with all gaming performance at peak.
1) Now, my question is, was the previous recommended setting the DEFAULT setting? Or maybe a patch changed it?
2) If it is the default setting, then why wasn't I experiencing performance issues before yesterday? Did something changed? Updates perhaps? Because I sure didn't changed the settings at all.
3) Is this related to my hardware? Is this a sign of my harddisk degrading? Or motherboard, CPU or GPU showing signs of wear? If my hardware is having problems, I shouldn't even have peak performance with the games even after disabling OAS, right? I need experts' confirmation that my hardware is still working fine. (CPU, GPU, harddisk etc.)
Please, any McAfee techs, please do confirm this so I can rest easy as my laptop warranty is valid at the moment, so if I have hardware issues, I can still make a claim, though I rather not as it will be a hassle still.
Thanks in advance for all who's going to chip in!