Windows 7 Sudden internet slow

Hi everyone, i hope you guys can help me.

Since about a week ago my internet has been very erratic in speed and reliability. at times the speed is normal but web browsing is slow and at other times webpages just dont load, full stop. going a month back, the computer worked fine without any issues, but now it is really starting to annoy me.

e.g. loading a 144p youtube video at times will take 5 minutes+

Troubleshooting:

I have run a virus and rootkit scan.
I have uninstalled and re-installed drivers.
i have done a system restore.
I have done a clean install of Windows 7 HP 64-bit
I have removed a RAM stick to test each.
I have tried in safe-mode.
Turned off and unplugged modem for 30 seconds.
Reset all connection settings


and none of those will work :(

i have tried with a wired connection and it seems to run fine, but where i am situated in my house i cannot have a wired connection, i use wireless.

any help would be greatly appreciated, i have attached the log from TSG Sys Info


Thanks Again!

---TSG Sys Info

Tech Support Guy System Info Utility version 1.0.0.2
OS Version: Microsoft Windows 7 Home Premium, Service Pack 1, 64 bit
Processor: Intel(R) Core(TM) i5-4670K CPU @ 3.40GHz, Intel64 Family 6 Model 60 Stepping 3
Processor Count: 4
RAM: 8130 Mb
Graphics Card: NVIDIA GeForce GTX 650 Ti, 1024 Mb
Hard Drives: A: Total - 943866 MB, Free - 695708 MB; B: Total - 476938 MB, Free - 345745 MB; C: Total - 114370 MB, Free - 63175 MB; D: Total - 9998 MB, Free - 9060 MB;
Motherboard: ASUSTeK COMPUTER INC., Z87-C
Antivirus: AVG AntiVirus Free Edition 2014, Updated and Enabled