Did you log into Windows to find a cursor over black with no keyboard response. Maybe the login process will finish and desktop will load after a long time. For laptops this may be a WLAN AutoConfig issue.
After using an issued PC with an SSD at the academy and a Macbook Air with SSD for the past year, my mid-2011 iMac’s performance seemed sluggish. It didn’t help that the Seagate hard drive was probably one of the affected units but not covered by the iMac 1TB Seagate recall. According to the recall page’s online form, the iMac’s serial number isn’t covered.