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Quarantined malware, still getting incredibly slow download speeds

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Hi, I bought a brand new computer this week, deleted some of the bloatware and installed a few programs of my own (including uTorrent, which I've disabled for now).  I'm on a connection that's advertised as 50 Mbps, and when I plugged in a friend's laptop and ran a speed test I actually got 67!  My connection, however is running at 2-7 Mbps for downloads, although upload speeds are unaffected (they hover around 15-20 on both computers).


During the week I had to quarantine several PUP registry keys, plus one Riskware and one Trojan file through Malwarebytes.  I also marked as safe two keygens, after researching them online to ensure they were "safe".  When my computer started running slow I thought one of the programs I installed, namely K9 Web Protection, might be causing it.  But when I uninstalled it the problem remained.  I've also ran troubleshooting on my network connections etc, spent many hours on the phone with my ISP, updated all my drivers including network ones, ran new virus scans, etc.


I have a pretty basic setup, so I'm hoping someone can have a look and see where the issue might be?  I'm attaching my Farbar scans as well as a HijackThis log.  Thanks in advance!




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Sorry, I should also include the quarantined viruses and where they were found:


Registry Keys: 5
PUP.Optional.OutBrowse, HKLM\SOFTWARE\CLASSES\TYPELIB\{DCABB943-792E-44C4-9029-ECBEE6265AF9}, Quarantined, [36a8bac12e4db2844a30ac9bed15e818],
PUP.Optional.OutBrowse, HKLM\SOFTWARE\CLASSES\INTERFACE\{3408AC0D-510E-4808-8F7B-6B70B1F88534}, Quarantined, [36a8bac12e4db2844a30ac9bed15e818],
PUP.Optional.OutBrowse, HKLM\SOFTWARE\WOW6432NODE\CLASSES\INTERFACE\{3408AC0D-510E-4808-8F7B-6B70B1F88534}, Quarantined, [36a8bac12e4db2844a30ac9bed15e818],
PUP.Optional.OutBrowse, HKLM\SOFTWARE\WOW6432NODE\CLASSES\TYPELIB\{DCABB943-792E-44C4-9029-ECBEE6265AF9}, Quarantined, [36a8bac12e4db2844a30ac9bed15e818],
Trojan.Agent, HKU\S-1-5-21-1975305595-59130391-485722035-1001-{ED1FC765-E35E-4C3D-BF15-2C2B11260CE4}-0\SOFTWARE\KeyGen, Quarantined, [a6389edd7efdb68038ad50e829daa957],

Files: 2
PUP.Optional.OutBrowse, C:\Users\Matty\AppData\Local\Temp\DownloadManager.exe, Quarantined, [36a8bac12e4db2844a30ac9bed15e818],
Riskware.Tool.CK, C:\Users\Matty\AppData\Local\Temp\7zODED9.tmp\keygen.exe, Quarantined, [8a546c0f6c0f979fae171b74bf4538c8],A


And the ones I marked safe were AutoKMS.exe which was flagged as having Hacktool:MSIL/Gendows and another with HackTool:Win32/keygen.

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