after installing windows essential my pc is constantly re-starting
I had a virus attack few days back - it took over my pc. I downloaded couple of anti-virus to remove.Those expired. Now removed those and downloaded microsoft essentials and it started to detecting a trogen virus and it keeps restarting my machine continously. I just cannot do anything with it!!
Need help please...
As PA Bear pointed out you should not try to install MSE (or any other resident AV program) on a malware compromised computer.
Your "description" of the events sounds like a Sirefef infection. Be advised this is a serious malware issue that may require you to reformat/reinstall your operating system. If you can successfully resolve this issue you may need to uninstall/reinstall MSE after your computer is "clean."
You should be able to remove MSE from Control Panel. Any problems uninstalling see: http://answers.microsoft.com/en-us/protect/forum/protect_start/uninstalling-mse/a63b8c4b-58ed-437e-8086-fa08d80725a4
Recommend you reboot the computer to ensure the uninstall is complete.
You can download a new MSE Installation File from here
Recommend you thoroughly review the following guide: Microsoft Security Essentials – Installation Checklist and Frequently Asked Questions
Now let's try to remove the infection and then you can uninstall/reinstall MSE.
Try these “free” on demand scanners which will not interfere with your resident AV program - you might need to run them in Safe Mode or Safe Mode With Networking:
Go to www.malwarebytes.org and download, install, update and run the free version – just follow the prompts. The prompt asks if you want to Start trial or Decline. To get the free version (without real-time scanning or web site blocking features) you need to choose Decline. You may need to rename the installation file to 123.exe or something similar to prevent the malware from disabling/blocking the installation. Or you might want to download the installation file to a flash drive or CD and then install Malwarebytes on the infected computer.
Try Superantispyware Portable at: http://www.superantispyware.com/portablescanner.html
SuperAntiSpyware Portable is "designed" to be downloaded onto a flash drive (or CD) and you could then insert the drive into your computer and run it from there. If you do that you may need to scan the flash drive for malware after using it on the infected computer. Superantispyware is a very good scanner but will also identify and remove cookies which are not considered to be malware.
Try Hitman Pro Trial Version: http://www.surfright.nl/en/hitmanpro This can be run from a flash drive.
Try TDSS Killer: http://www.bleepingcomputer.com/virus-removal/remove-tdss-tdl3-alureon-rootkit-using-tdsskiller TDSS Killer may be run from a flash drive.
Try the Eset Online Scanner: http://go.eset.com/us/online-scanner
Try this MS scanner: http://www.microsoft.com/security/scanner/en-us/default.aspx
You may need to use one of the following offline scanners - you'll need to burn a CD using a different computer and change the boot sequence on your computer to run the scan - instructions are included with the links:
If you would like assistance from a malware removal forum suggest you consider this web site - http://www.bleepingcomputer.com - which contains details for many of the common infections, often immediately after they began to appear in the wild, and instructions are provided for how to remove the infections using their malware removal guides. They also have forums where you can seek help from people who specialize in malware removal.
Windows Insider MVP 2016-2017