On 9/10 Microsoft Security Essentials warned me that my PC was infected with "Trojan:Win64/Sirefef.AN". I allowed Microsoft Security Essentials to remove it.
I also followed all of the steps here for removal of sirefef:
After this removal process, internet explorer cannot connect to google or yahoo. I don't get any message, just a blank screen. I can access other websites such as Microsoft.com. I reinstalled IE 11, but it still cannot connect to google or yahoo.
Also Symantic Endpoint protection detected trojan.zeroaccess.c and trojan.gen.2. I allowed Symantec to remove them.
EMSISoft Emergency kit detected and removed Urausy which appears to be ransom ware. Although I never received any ransom ware attacks.
I have run MBAR and TDSSKiller and they didn't find anything.
How should I proceed