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Is Windows Defender's Scanner Reliable?

Tags:
  • Windows Defender
  • McAfee
  • Scanners
  • Windows 8
  • Laptops
Last response: in Windows 8
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March 12, 2014 2:40:46 PM

About 1 and a half days ago my McAfee trial had ended on my 2 month old brand new Asus laptop. I sort of neglected this message that kept telling me to subscribe to McAfee to continue to use its protection for my laptop because I wasn’t going to subscribe to it anyways. It wasn't until last night that I bothered with this issue and I deleted McAfee and used their downloadable remove tool to completely remove the program.

However, I realized last night that over those 1 and a half days that my laptop was telling me that the trial has expired, my laptop was not protected with any firewalls or antivirus (windows defender was off). Over the 1 and a half days without protection, I did NOT open any browsers (IE, FF, Chrome), all I did was play Counter Strike: Global Offensive from steam and browsed the steam store. I also talked on a program called Mumble with 3-4 very trustworthy real life friends (we were the only people on the server/ know of the server). And lastly, I downloaded Left 4 dead 2 from the Steam store since the game was on sale (seriously, out of all the days I could have downloaded L4D2, it had to be when my laptop wasn’t protected). I know for a fact this is ALL I did when my laptop was not protected. I spent a total of maybe 9 hours doing all this over the last 1 and a half days while my laptop wasn’t protected and most of the time I was playing CS:GO through steam.

I’m worried now whether or not there was a possibility I caught a virus or something during this time since my laptop wasn’t protected. I performed a Quick and Full scan with Windows Defender and it found nothing. Is Windows Defenders scanner Reliable? Can I trust it since it found nothing that my laptop really didn’t get infected over the time it wasn’t protected? I was thinking whether or not to restore to a point before my McAfee had expired to possibly erase any harms that may have been downloaded and quickly set up Defender. Are there any other better ways to see if I got infected other than W.D scanner? Am I just being a bit paranoid or should I be OK? This is on a Windows 8 OS.

Thanks in advance

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March 12, 2014 2:48:45 PM

Davidt08 said:
About 1 and a half days ago my McAfee trial had ended on my 2 month old brand new Asus laptop. I sort of neglected this message that kept telling me to subscribe to McAfee to continue to use its protection for my laptop because I wasn’t going to subscribe to it anyways. It wasn't until last night that I bothered with this issue and I deleted McAfee and used their downloadable remove tool to completely remove the program.

However, I realized last night that over those 1 and a half days that my laptop was telling me that the trial has expired, my laptop was not protected with any firewalls or antivirus (windows defender was off). Over the 1 and a half days without protection, I did NOT open any browsers (IE, FF, Chrome), all I did was play Counter Strike: Global Offensive from steam and browsed the steam store. I also talked on a program called Mumble with 3-4 very trustworthy real life friends (we were the only people on the server/ know of the server). And lastly, I downloaded Left 4 dead 2 from the Steam store since the game was on sale (seriously, out of all the days I could have downloaded L4D2, it had to be when my laptop wasn’t protected). I know for a fact this is ALL I did when my laptop was not protected. I spent a total of maybe 9 hours doing all this over the last 1 and a half days while my laptop wasn’t protected and most of the time I was playing CS:GO through steam.

I’m worried now whether or not there was a possibility I caught a virus or something during this time since my laptop wasn’t protected. I performed a Quick and Full scan with Windows Defender and it found nothing. Is Windows Defenders scanner Reliable? Can I trust it since it found nothing that my laptop really didn’t get infected over the time it wasn’t protected? I was thinking whether or not to restore to a point before my McAfee had expired to possibly erase any harms that may have been downloaded and quickly set up Defender. Are there any other better ways to see if I get infected other than W.D scanner? Am I just being a bit paranoid or should I be OK? This is on a Windows 8 OS.

Thanks in advance


You'll be fine. I ran WD in tandem with Malwarebytes and AVG, it sometimes found things they couldn't. By the way, what laptop do you have? I've got an ASUS N56VZ, and was just wondering if we're on the same machine. Hope I helped.
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March 12, 2014 3:25:08 PM

Silibant said:
Davidt08 said:
About 1 and a half days ago my McAfee trial had ended on my 2 month old brand new Asus laptop. I sort of neglected this message that kept telling me to subscribe to McAfee to continue to use its protection for my laptop because I wasn’t going to subscribe to it anyways. It wasn't until last night that I bothered with this issue and I deleted McAfee and used their downloadable remove tool to completely remove the program.

However, I realized last night that over those 1 and a half days that my laptop was telling me that the trial has expired, my laptop was not protected with any firewalls or antivirus (windows defender was off). Over the 1 and a half days without protection, I did NOT open any browsers (IE, FF, Chrome), all I did was play Counter Strike: Global Offensive from steam and browsed the steam store. I also talked on a program called Mumble with 3-4 very trustworthy real life friends (we were the only people on the server/ know of the server). And lastly, I downloaded Left 4 dead 2 from the Steam store since the game was on sale (seriously, out of all the days I could have downloaded L4D2, it had to be when my laptop wasn’t protected). I know for a fact this is ALL I did when my laptop was not protected. I spent a total of maybe 9 hours doing all this over the last 1 and a half days while my laptop wasn’t protected and most of the time I was playing CS:GO through steam.

I’m worried now whether or not there was a possibility I caught a virus or something during this time since my laptop wasn’t protected. I performed a Quick and Full scan with Windows Defender and it found nothing. Is Windows Defenders scanner Reliable? Can I trust it since it found nothing that my laptop really didn’t get infected over the time it wasn’t protected? I was thinking whether or not to restore to a point before my McAfee had expired to possibly erase any harms that may have been downloaded and quickly set up Defender. Are there any other better ways to see if I get infected other than W.D scanner? Am I just being a bit paranoid or should I be OK? This is on a Windows 8 OS.

Thanks in advance


You'll be fine. I ran WD in tandem with Malwarebytes and AVG, it sometimes found things they couldn't. By the way, what laptop do you have? I've got an ASUS N56VZ, and was just wondering if we're on the same machine. Hope I helped.


I have an Asus X550LC. I've heard that it's possible to catch viruses by just simply being connected to the internet. Even though I didn't browse the net through web pages, I did interact with the internet through steam and Mumble. I might be a bit over worried but it's good to be skeptical and thanks for the reply.
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March 12, 2014 3:26:10 PM

Oops, accidentally chose best solution
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March 12, 2014 3:35:17 PM

Davidt08 said:
Oops, accidentally chose best solution


LOL, thanks. Anyways, concerning your other reply, yeah, it's good to stay safe. Turn real-time protection on and you're safe for a while. Besides, if you have the money, an additional antivirus is good, but not necessary.
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