yes you should but it will be very protective but you wont have any visuress
best not to as they might conflict
It looks like cyber defender is a type of antivirus software that is an early defense and early detector for your computures. It should protect your computer from viruses.
If McAfee Security Suite has an anti spyware component then you will not need windows defender
If you have a Windows 10 computer it comes with Microsoft Windows Defender Anti-Virus installed. After years of running other anti-virus, I was advised that I did not need it and that Microsoft's product was good enough. Just do some research on it as compared to other anti-virus programs.
There is a windows defender and Microsoft Malicious removal tool an integrated features of windows 7. We recommend that you install security software to help protect your computer from viruses and other security threats, and that you keep your security software up to date.
Your virus protection is listed in the installed programs list, and should also have an icon on the desktop for Windows, or an entry on the list generated by clicking the Start button at lower left. If no virus protection is installed, you may be prompted to start either Windows Defender or Microsoft Security Essentials (both are free for all Windows PCs). There is also anti-malware in the Action Center for Windows 7 and Windows 8.
1. You might try this. Go to the main Windows Update window and click on "Installed Updates" (on the left-hand side of the window, at the bottom), and then remove "Update for Microsoft Windows (KB931099)" (only). Reboot. Reboot again. Go back to Windows Update, and re-install the same update, by clicking on the Check for Updates button. This should essentially re-install Windows Defender on Vista. 2. 1 Go to control Panel and click on Administrative tools. 2 Click on services and a new windows will appear. 3 Look up for windows defender and right click on it, click on properties and select automatic, it should be on manual, change it to automatic and click apply then o.k. and will take you back to the services windows. 4 Windows Defender should be highlighted and on the left hand side of the services windows, should be 2 links, click restart. 5 Close all windows and open Windows Defender, it should work without a problem and your popup window at start up will not be display any longer.
Just to get rid of malicious viruses
Dear friend, Use windows defender software it automatically downloads recommended updates for your computer it is free to download just search for it on the web http://latestxptips.blogspot.com
You should always have an anti-virus and anti-malware program running when you are connected to the internet. Windows Firewall is only designed to prevent unauthorized access from a network, not for general protection from harmful programs. There are numerous commercial antivirus programs (Norton, MacAfee), several of which may be suggested when you first begin using your computer. The default Windows security program is Windows Defender, but there is a separate program, Microsoft Security Essentials, that has a slightly broader range of coverage.
Just to be on the safe side...yes you should turn windows defender off. The reason is because windows defender is comprised of three (3) programs. A anti virus, anti spy ware and anti maleware. In addition you cannot have two (2) anti virus programs running at the same time. They will conflict with each other and cause numerous windows errors. Furthermore If you are installing more protection I must assume you are not happy with defender? I suggest a little more research you'll find your later choice isn't all that good. Hope this helps
You should have a license key which is used to uninstall ESET NOD32. If you don't, then you have to delete some values from Windows Registry.
I think it's not your vista, but the hardware. Try to monitor CPU and GPU temperatures. It might be bad thermo contact. You should try to reinstall windows, or install a good antivirus.