Solved Internet (or PC) slows connection speed after Telnet

[BryanJames16]

My friend borrowed my PC and internet connection last week. He enabled and started telnet (both on services.msc and control panel) and started to Telnet. After this I tried downloading MP3 on the internet. But it was so slow! I mean it's really slow that it's not even downloading. I try to download other files. But then it won't download (or is just slow). I use Chrome and tried to use Firefox for download. At first it goes well. But after 2 - 3 downloads, it failed. Also tried in IE but doesn't work. I stopped the Telnet service, disabled it both in services and Control Panel. I also reinstall Chrome. But it doesn't really fix the problem. I am using a download manager (wxDownload Fast) to download files. Yes it download files, but even wxDF had a really hard time downloading a even single 1.6 MB file. I try to ping google and it was 100% completed.

My browsing is okay. I browse Facebook and other sites normally. But whenever I try to play games on Facebook, elements would load but the game would not.
Please help! Thank you very much

Add'tl Info:
> We are not using any router. We are connecting directly to the modem.
> Tried to use speedtest. It was normal.

 

[2xg]

Hello,

I'd try System Restore, back date it when before your friend borrowed your computer. If this process didn't work, use Free Malwarebytes or SuperAntiSpyware then scan for any possible nasties.

 

[BryanJames16]

Thanks! It worked! Internet regained it's speed again after scanning laptop for 12 hours. 5 threats found, cleaned and deleted. Thanks!!

 

[2xg]

You're quite Welcome!
Glad that we could help.

Thanks! It worked! Internet regained it's speed again after scanning laptop for 12 hours. 5 threats found, cleaned and deleted. Thanks!!