It does what the title say. After installing KB2811660 my front USB2.0 ports doesn't work and only way to resolve it, is to do a system restore to an earlier point. I'm running ASUS P8Z77-V with i5 in Xigmatek Midgard II computer case. (USB3.0 port not affected)
Device description
Generic USB Hub
Hardware IDs
USBVID_8087&PID_0024&REV_0000USBVID_8087&PID_0024
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Device description
Generic USB Hub
Hardware IDs
USBVID_8087&PID_0024&REV_0000USBVID_8087&PID_0024
View this thread