Recently my DWA-552 adapter card is really messed and i cant find any sort of troubleshooting guide to help me. For some reason my internet has been goin really slow, ive had this adapter for more than a year now with no problems, ive been connecting to our dlink downstairs and ive been fine up untill now. I check my internet settings and it says i have an excellent connection but i dont, for some reason its like the connection is flickering on and off. I also checked the card and the green light that normally just stays green is now blinking and i cant figure out whats wrong please i need help!