Windows 7 Home Premium Suddenly Running Very Slowly

I have had this new laptop for about a month. It's a gaming laptop and I've had no problems until today. Startup which usually takes about 20 seconds from power on to all startup programs functional, now takes 3 minutes with desktop items taking a long time to display.

Upon completion of startup, chrome browser still takes several seconds to open when previously it was instantaneous. New webpages take 20-30 seconds to open when speedtest.net shows a download speed of 31mbps.

Simply opening a program or an Adobe document takes way too long, with the blue spinning circle icon all too present in the simplest of tasks.

I downloaded AVG Free and ran a full scan which reported clean bill of health. I then bought AVG PC Tune Up. I have cleaned the registry, defraged the registry, optimized start up and shutdown, and defraged the hard drive.

I know this is a common problem but with many different causes, which is why I thought to start a new thread. When I ran an Event Log it came up with a lot of Warnings and Critical which I know nothing about. Thanks very much, if someone could please let me know what I should do next. Really don't want to do a clean install if possible.

I attached a .txt of the event log if this helps.

Ok so I know this is late to ask but:

What if you just scan using Microsoft Security Essentials and it checks out. It still is running slow for me and I have had this PC for about 4 months. I've tried so many things, I've had to factory reset it once just to help it a little, I've even bought new parts for it.

I'm having similar issues as the original poster, if the free programs you recommend find something what is the next step?