Guild Wars 2

my spec is quite high end.. but im not like really good at tweak computer setting and stuff..
i have x79 sabertooth motherboard
gtx 590 and cpu is i7- 3820 ram 16gb
my internet speed is 30mbps

i have no such big problem gaming ever since it released. no delay for using skills and stuff no stop motion and fast forwarding.
maybe little bit of frame issue while doing some huge zerg in wvw but no big issue for that.
its like i cant play the game even theres no people around ..
while i play my guardian, pressing number 3 skill. its pressed but like after 1~2sec later it actually active.. and sometime just stop the game and after like 3 sec later it just fast forwarding.. i just want to fix this issue..
shud i reinstall the game or format computer? or is this my internet router issue?
please help me
thank you

Sounds like latency issues. What is your ping time? (See Part 7.9)

You can try -repair command if you want and see if it helps. (See Part 1.1)