Hmm actually this problem and me installing malwarebytes(full version not the free one) did occur around the same time...but I think I dled in in fear a virus was tampering with my computer but I'll check.
My laptop uses wifi from the same router my computer is directly connected to. My AV are malwarebytes which I meantioned above and nod32 which I've used for 2 years and never had any problems...
And I never browse this site in public areas such as internet cafes or open wifi areas(closet otaku it's called?

)
If I was banned wouldn't I be blocked from getting on the site in general with this account? I don't post much at all, occasional comment on new animu release but I wouldn't say anything note worthy...any way to check if I'm banned?
Thanks for all the help guys! I don't think my firewall is the problem but I will go test it
Edit: Turned out to be malwarebytes o_O turned off it's website protection thing. THanks for the posts guys