RE: windowsdefender security setup
Real-time protection
+1 for the Limited User Account.
I would suggest that you install CIS because the COMODO Firewall is way more powerful than what Windows is offering.
On-demand scanners
VTUploader (Free) -
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To upload a file to VirusTotal, you can visit the main analysis site, click the Browse button to select a file from your hard drive, and then click the Send file button. You can make this process even easier with the free VirusTotal Uploader utility. After installing it, you can simply right-click any file under 20MB and choose "VirusTotal" from the Send To Windows menu. The scan results will display in your browser as usual.
Emsisoft Emergency Kit (Free) -
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With the Emsisoft Emergency Kit Scanner you have got the powerful Emsisoft Scanner including graphical user interface. Search the infected PC for Viruses, Trojans, Spyware, Adware, Worms, Dialers, Keyloggers and other malign programs.
Run the Emsisoft Emergency Kit Scanner with a double click on a2emergencykit.exe. Found Malware can be moved to quarantine or finally deleted.
Additional browser protection:
Like Earth said you should really consider changing your browser.You can add this site advisor and a password manager.
WOT (Free) -
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To help you avoid malicious sites you can use Web of Trust (WOT) a website rating browser plugin. After you add it to your browser make sure you only visit websites rated "Green" by WOT
LastPass (Free/) -
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LastPass is an online password manager and form filler that makes web browsing easier and more secure.
Extra protection:
EMET 2 (Enhanced Mitigation Experience Toolkit) (Free) -
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EMET provides users with the ability to deploy security features built into Windows to arbitrary applications. This helps prevent vulnerabilities in those applications from successfully being exploited. DEP, SEHOP and ASLR are such security features, if you want to learn more about what they do, you can watch this
video from Microsoft TechCenter. To configure EMET you should follow this
guide by rationallyPARANOID.