No, Windows Firewall is not enough. No, anti-spyware is not enough. You need a current, configured, updated anti-virus program running all the time. You need a firewall. You need at least two spyware/adware programs.
You are flirting with disaster, especially with the Ripe backbone on your system You are as sitting duck for malware. It's useless to clean you up if you're not going to run the proper security programs, which should be updated and scanned with regularly.,.
"I personally think that QQ is safe to use since I've used it for quite a long time don't have any obvious problems." hard to understand since here you are, asking to have your log reviewed! Your computer is not clean!