Please review the
Tech Support Forum Rules & Conduct, and you'll see we provide no support for P2P applications here at TSF. So, we can't help with that particular issue.
As far as general browsing, I'd start by shutting down ALL P2P applications and see if that changes things.
I'd also do an on-line virus scan, pick from one of these:
Trend Micro™ HouseCall
McAfee FreeScan
Kaspersky Online Virus Scanner
Panda ActiveScan with TruPrevent