That is the question because it looks that reinstalling windows doesn't work and i think there is a virus on my computer.
Hello and could you please elaborate your question. What makes you think you are infected? Have you ran a full scan with Norton? What is your OS? What version of Norton are you running? Are you getting odd popups? Redirects? Screen locks? You can always reinstall Windows. Would love to help you but I need a lot more information. You can also download some free malware removal tools once I know what is going on. Thanks.
ok, so i have unreal memory usage as 100% almost after cpu working 15-30 mins with only few tabs open with 2 browsers: firefox and chrome. I use windows 7 and i have 16gb of ram. I reinstalled windows 3 times. 2 times win 10 and when problem continued switched to windows 7. Usually i don't use antivirus program but looks like if it some kind i would. That's why i ask. Want to see what is the best norton product for such purpose.
Before installing any AV product, you need to remove any infection. Installing an AV on an infected system can result in a corrupted AV install as the malware tries to block the proper installation.
You could try the Norton Bootable Recovery Tool. You will need to download this to a clean system to create the media you can use on the infected system. www.norton.com/nbrt
There are a hundred million different reasons why you could have 100% memory usage. You need to figure out what programs are using up this usage. Use Process Explorer and enable Virustotal option in it. Just cause you reinstalled Windows does not mean a thing unless you completely wiped your disk clean first. Exactly how did you reinstall Windows 7 or 10? Does your pc have a bootable recovery partition you can mount? Just about every new laptop or desktop does, As peter has stated you cannot properly install and antivirus if your system is currently infected. It is best to scan your pc out side of Windows. Norton Bootable Recovery works great as well as Kaspersky Rescue disk. But again this does not mean your system is infected. If you never used an antivirus to protect your pc then you should have had a system image backup to fall back on.
Download Process Explorer and enable the Virustotal option. Let it scan all your running process. See if any are malicious. If none then use Process Explorer to find what program is usage so much CPU time and memory usage. You need to do some serious trouble shooting first and foremost.
Didn't know that a virus can corrupt antivirus program installation. When i reinstall windows i format my drive and install it clean. Both windows 7 and 10 same way as always.I'll see what process explorer will show with that virustotal option.
Hard or not gonna keep searching for the answer for sure:)
Hard? Care to elaborate? If you have completely and totally erased your hard drive then that will wipe out any traces of malware. There is a few exceptions such as a BIOS virus. But based on what you said previously you are not infected. You just have to find what process or service is using the most CPU & memory. It maybe best to scan your pc outside of Windows. Such as using the Norton Recovery Tool or a Kaspersky Rescue Disk. Both can be installed on a USB stick and then you boot your system off of that,
When you re-install, are you reformatting the partition or the entire drive?
Why are you asking about finding a virus in a "Logical" drive? Do you have logical partitions on that drive in addition to primaries?
Since i use 120gb ssd for boot drive i erase the entire drive.
Gonna try that options too. Will respond if anything changes. Tnx for the tips.
How to you go about formatting your drive? it is best to boot from a DVD or a USB stick. I use KillDisk
I use the windows installation to format the drive.
Windows installation cannot fully format a drive. It merely overwrites everything. To properly format a drive you need to write zero's to it. KillDisk can do this.
Boot the windows installation disk to a command prompt and use diskpart to 'clean' the disk, this removes everything, including the partition table and MBR.
It's a myth when people say a virus can survive a format, nothing can survive a format. What happens is that a virus or rootkit can be in another location that is outside the partition that is formatted. It can be in a hidden partition and/or the MBR or boot sector of the drive can be changed to load something else before starting the windows boot process. Cleaning the drive will ensure nothing is left.
Boot your Windows 7. 8. or 10 DVD like this.
In figure 7, select the bottom option for command prompt.
When at a command prompt type the following pressing enter after each line
(if you have more than one hard drive make dam sure you can tell them apart, look at the size of the drives, your SSD should be smaller one, I will assume your ssd is disk 0. Be warned that if you select the wrong drive you will loose all the data on that drive)
select disk 0
(note the spaces after each word)
Your drive is now entirely empty, type exit twice, once in diskpart and once in the command box, reboot the DVD and proceed with the installation as normal, just like on a brand new empty hard drive the windows setup will partition the drive and add the proper "known good" partition table, boot sector and MBR.
I also agree with one of the above posts. 100% memory usage is usually caused by something else, bad drivers or software in most cases. Ensure that you install the latest drivers for that system from the manufactures website, don't skip hardware because it appears to be working fine with the drivers included in the windows setup.
Best of luck,
Very Nice DaveH. Good guide. I find it much much easier to use KillDisk. But we do not know if he had a virus. He is speculating based on his RAM and CPU usage. Nothing was ever confirmed.
I agree, we don't know if it's a virus. Actually it's more than likely not.
However, since Jordan is concerned with it he may have more information then was given and if he wants to take that path for his own "piece of mind" he might as well do it completely and thoroughly. That really is the way to do a "clean" install, start from a clean and empty drive.
I'm reluctant to recommend a disk wipe because so many people are concerned about "wearing out" a SSD. They also take a long time and you really don't need to wipe the entire drive to remove an infection, you would only really need to wipe the first 512 bytes or 2-3MB of a sector aligned drive to remove the partition table, mbr, and boot sector.
Very true Dave. I would not worry about wear and tear on an SSD. It would take about 6-8 hours with KillDisk but I always go this route to ensure everything is gone.
Very nica guidance DaveH. Thank you for that complete explanation. Looks like gonna take time so i will do it when a have more free time. I always thought that windows format was deep enough:(
Be careful with KillDisk. I just did a Google search and I saw that there is now Kill Disk malware and ransomeware . There are quite a few links..
This is KillDisk
http:// www . killdisk . com/downloadfree . htm
I was just pointing out if someone new to the program and did a quick Google search could look for KillDisk W I p e r and end up finding out about the malware.
Finally I fixed my problem simply by reinstalling windows and going back to win 10.
Even when I open few tabs both from firefox and chrome still no more than 3 gb of memory usage.
This problem is fixed but now audio problem rises with realtek codec not supporting dts in win 10.
Gonna swallow it and move forward.
Thank you for your opinions and help. Cheers
Now it's better :)
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