Windows 7 Forums
Welcome to Windows 7 Forums. Our forum is dedicated to helping you find support and solutions for any problems regarding your Windows 7 PC be it Dell, HP, Acer, Asus or a custom build. We also provide an extensive Windows 7 tutorial section that covers a wide range of tips and tricks.


Windows 7: Possible Virus? Strange Slowdowns & Sudden Shutdowns - Windows 7

11 Jun 2015   #1
GojiraJune

Windows 7 Home Premium 64 bit
 
 
Possible Virus? Strange Slowdowns & Sudden Shutdowns - Windows 7

I've had Windows 7 for probably 2 or so years now. I've experienced some weird slowdowns and sudden shutdowns on my computer. For reference, I use Avast, Microsoft Essentials and Norton Antivirus to detect any malware or Trojans on my computer... but when I search for something I find nothing.

My computer has these strange slowdowns... at least I think that's the best way to describe them. They're quick and seem to come in intervals. It affects video and audio; I can't watch or listen to anything without this phenomenon happening. It never lasts more than a second but it makes video freeze and it makes audio glitch -- I have to deal with sharp, loud pauses of the audio while listening or watching anything. It seems like they're set in either 5 minute or 10 minute intervals.

Another problem is a sudden shutdown. For whatever reason, some websites seem to have trouble loading properly. Sometimes they load quickly, other times they only load partially and end up giving me a 404 error. I have to refresh the page sometimes 3 or 4 times to try and load things properly. I haven't picked up any pattern in the websites that cause this odd problem. From what I can tell, after a certain amount of refreshes on these websites, my computer suddenly shuts down -- as in, the screen goes black, I get a quick glimpse of a blue screen and then the computer boots up as if I restarted it. Sometimes, the computer takes forever to boot up after one of these incidents and I have to manually shut the computer down and try to restart it.

I have no idea what's wrong with my computer. I assume it's something like deeply embedded malware or maybe even a virus... Before I got this new computer with Windows 7, I had a computer with Windows XP for about 10 years; my hard drive's memory and files were eaten away by some stubborn virus which had embedded itself into my System32 folder. I have no idea if anyone else has ever experienced these problems and if it's even a case of malware or a virus.


My System SpecsSystem Spec
.
11 Jun 2015   #2
GokAy

Windows 7 Ultimate x64 SP1
 
 

You seem to have multiple issues:
- You shouldn't run couple of Antivirus software simultaneously. Pick one of those and uninstall the other two.
- Install Malwarebytes Anti-Malware free (you can start the trial for premium, it is easy to switch to free after two weeks) and run a scan
- Download HWInfo and run with sensors (asks after starting), check the temperatures.
- The blue screen is called a Blue Screen of Death (BSOD). Start a new thread in BSOD section and supply what's been asked. (read the sticky)
- run in cmd: sfc /scannow
- perform a clean startup and see if you have issues Troubleshoot Application Conflicts by Performing a Clean Startup
- go into BIOS and disable C1E, if that doesn't help with slowdowns, try disabling Intel SpeedStep (IEST).
My System SpecsSystem Spec
11 Jun 2015   #3
madfa

Windows 7 Ultimate x64
 
 

Well Anti virus does not mean that you can get infected! Its very easy to make a virus without anti virus even noticing it! So you always have to make sure the file you are opening is safe, And also download CCleaner and clean your computer and also uncheck unnecessary files from startup (its inside CCleaner options)
Its better to remove your AntiVirus and just use your windows defender
My System SpecsSystem Spec
.

11 Jun 2015   #4
GokAy

Windows 7 Ultimate x64 SP1
 
 

I don't believe "just" Windows Defender is enough, that's bad advice. You should have something like 1 active AV and something like MBAM (free or premium). Check the System Security section of the forums for further information and recommendations.
My System SpecsSystem Spec
11 Jun 2015   #5
madfa

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by GokAy View Post
I don't believe "just" Windows Defender is enough, that's bad advice. You should have something like 1 active AV and something like MBAM (free or premium). Check the System Security section of the forums for further information and recommendations.
Well ill make a virus and run it on your computer and lets see if your updated Antivirus can catch it, They only way you wont be infected if to make sure the file is not infected before running it, I analyse files using Sandboxie + BSA and Phrozen File Monitor and i dont use AntiVirus and its more than 4years im using windows, If i decided to use AntiVirus i will use Malwarebytes
My System SpecsSystem Spec
11 Jun 2015   #6
UsernameIssues

W7 Pro SP1 64bit
 
 

Quote   Quote: Originally Posted by madfa View Post
Quote   Quote: Originally Posted by GokAy View Post
I don't believe "just" Windows Defender is enough, that's bad advice. You should have something like 1 active AV and something like MBAM (free or premium). Check the System Security section of the forums for further information and recommendations.
Well ill make a virus and run it on your computer and lets see if your updated Antivirus can catch it, They only way you wont be infected if to make sure the file is not infected before running it, I analyse files using Sandboxie + BSA and Phrozen File Monitor and i dont use AntiVirus and its more than 4years im using windows, If i decided to use AntiVirus i will use Malwarebytes
Cars can break down - so you should walk everywhere.

Just because an antivirus tool misses some stuff does not mean that you should avoid using them to catch what they can catch. It is impractical to expect every computer user to use their computer the way that you described (e.g. Sandboxie + BSA and Phrozen File Monitor).

I understand that it is a tradeoff. I understand that antivirus tools can slow computers down. That is why there is so much debate on which ones provide the best protection with the least impact on the computer. If you want to advocate for using no antivirus tool, then this thread What's the Best Anti-virus? is a good place for such discussions.
My System SpecsSystem Spec
11 Jun 2015   #7
gregrocker
Microsoft MVP

 

Norton is nothing but problems we've seen here since Day 1. It's overweening bloatware.

Avast was once suggested co-equally with MSE by most of us here, although one should never run two AV's. Gradually as it bloated up and started causing problems seen here which were solved by uninstalling it, we stopped recommending it and I never see it recommended for anything here except uninstall with the special tool needed for bloatware AV's. Uninstallers (removal tools) for common antivirus software - ESET Knowledgebase

Run a full Scan with Malwarebytes and AdwCleaner which are the most potent scanner tools to have on hand. If you get regularly infected instll MBAM's Real Time protection for cheap to not get infected again.

Establish a Clean Boot, check System Resources for problems and solutions, cull the logs for repeat errors to resolve, test your hardware, and the rest of the Troubleshooting Windows 7 Failure to Start
My System SpecsSystem Spec
11 Jun 2015   #8
Layback Bear

Windows 10 Pro. 64/ version 1709 Windows 7 Pro/64
 
 

Quote   Quote: Originally Posted by madfa View Post
Quote   Quote: Originally Posted by GokAy View Post
I don't believe "just" Windows Defender is enough, that's bad advice. You should have something like 1 active AV and something like MBAM (free or premium). Check the System Security section of the forums for further information and recommendations.
Well ill make a virus and run it on your computer and lets see if your updated Antivirus can catch it, They only way you wont be infected if to make sure the file is not infected before running it, I analyse files using Sandboxie + BSA and Phrozen File Monitor and i dont use AntiVirus and its more than 4years im using windows, If i decided to use AntiVirus i will use Malwarebytes
With a little research you will find that Sandboxie has also been hacked.
No security program is 100%. If their was we would all be using it.

In my opinion if one doesn't use a Anti Virus program the are foolish.

The bad guys create thousands of bad things every day. I know I'm not smart enough to keep up with it so I do use MSE and Malwarebytes Premium. So far so good. When need be I do run some other security on demand programs.

Of course if someone own the computer they can use what ever programs they prefer.
My System SpecsSystem Spec
11 Jun 2015   #9
madfa

Windows 7 Ultimate x64
 
 

Quote   Quote: Originally Posted by Layback Bear View Post
Quote   Quote: Originally Posted by madfa View Post
Quote   Quote: Originally Posted by GokAy View Post
I don't believe "just" Windows Defender is enough, that's bad advice. You should have something like 1 active AV and something like MBAM (free or premium). Check the System Security section of the forums for further information and recommendations.
Well ill make a virus and run it on your computer and lets see if your updated Antivirus can catch it, They only way you wont be infected if to make sure the file is not infected before running it, I analyse files using Sandboxie + BSA and Phrozen File Monitor and i dont use AntiVirus and its more than 4years im using windows, If i decided to use AntiVirus i will use Malwarebytes
With a little research you will find that Sandboxie has also been hacked.
No security program is 100%. If their was we would all be using it.

In my opinion if one doesn't use a Anti Virus program the are foolish.

The bad guys create thousands of bad things every day. I know I'm not smart enough to keep up with it so I do use MSE and Malwarebytes Premium. So far so good. When need be I do run some other security on demand programs.

Of course if someone own the computer they can use what ever programs they prefer.
Im not saying that if someone uses AV is a foolish

the reasons i dont use AV
- Makes computer slow
- Some users when they install AV they think they are protected and they run anything because they think their AV can catch it!

Its simple to make a virus undetected download crypter crypt your virus done! That simple
Im virus expert and researcher its my job

MSE and Malwarebytes Premium are good, But virus can be inside .doc .pdf .zip or anything else if there is exploit for that and there is.

So the best way to protect your self is not to trust every link on internet or if you do and you are not sure
scan the file online https://www.virustotal.com/
My System SpecsSystem Spec
12 Jun 2015   #10
gregrocker
Microsoft MVP

 

Using MSE or a slightly more aggressive AV like Panda Cloud does not slow down any modern PC.

If it isn't enough protection add Malwarebytes Real Time and no one I help has ever gotten infected again.

Win7 should be instantaneous and never hang on adequate hardware providing it has a perfect install such as the one compiled in Clean Reinstall Windows 7. No one of the 1.5 million who have used it have ever come back with a single complaint. They have the best installs of Win7 in the world today.
My System SpecsSystem Spec
Reply

 Possible Virus? Strange Slowdowns & Sudden Shutdowns - Windows 7




Thread Tools




Similar help and support threads
Thread Forum
Sudden shutdowns on low battery
My computer was working just fine a few weeks ago, but lately it hasn't been reacting properly to low battery levels. Instead of giving me two warnings and then going through the shutdown process, it now gives me no warnings and then there's a physical click as my screen goes black instantly. When...
General Discussion
Desktop / Explorer icon instability & sudden shutdowns
I have an Acer Laptop running Windows 7 Home Premium 64 bit, on two external Acer monitors, MS Comfort Keyboard, and over the last couple of weeks, it has begun to show some real odd problems: - in Windows explorer on one monitor, the contents display (Right side) will flicker between "Details",...
General Discussion
Custom Build, sudden shutdowns
so i made my own custom build pc and it keeps getting BSOD whenever i do something too processor intensive. i have 2 suggestions on why this could be happening but i thought i'd ask someone before spending money on replacement parts. 1. my power supply is too big, sending too much power to the...
Hardware & Devices
Possible Virus/hacker causing computer/network slowdowns - please help
Hi all, over the last week or so I've noticed my internet connection speed drop to below 2.2Mbps Down and .9Mbps Up where I'm supposed to be 50Mbps Down and 3Mbps Up via cable. I've monitored the network traffic when running the speed tests and there doesn't seem to be anything else running...
System Security
Windows 7 crashing/sudden shutdowns
I came across this thread, on the 'Intel site', which may be of some help to others; DP55WB & Core i5 + Win7 + Speedstep = ... John
BSOD Help and Support


Our Sites

Site Links

About Us

Find Us

Windows 7 Forums is an independent web site and has not been authorized, sponsored, or otherwise approved by Microsoft Corporation. "Windows 7" and related materials are trademarks of Microsoft Corp.

Designer Media Ltd

All times are GMT -5. The time now is 13:56.
Twitter Facebook Google+