AWS EC2 High CPU alarms going off

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I have a micro EC2 instance running windows 2008 R2. I've been getting a lot of high CPU alarms going off lately, and when I log into the AWS management console I see that my CPU is practically pegged at 100%. However, if I log into the instance and pull up task manager, my CPU looks like it's practically idling. I've left task manager open for a while and took this screenshot showing the differences between was AWS is reporting and what my instance looks like it's doing. Suggestions?

CPU Usage Graph (https://s3.amazonaws.com/caskerdbbucket/public/cpu.png)

PS: the update speed on task manager is set to "Low"

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