Am running XP Professional (Service Pack 3)
I recently somehow almost instantly acquired a Trojan & could do nothing with my standalone computer.
Although I could boot the sytem, it would not let me access anything (AVG Free AntiVirus software Version 9.0, etc, etc.)
It continually tried to send me to antivirmore.net to “update” it by purchasing it.
Out of desperation, I “ended” some processes in Task Manager that I did not recall as normally occurring.
That allowed me to finally access my AVG software.
I then did a complete scan of my system but it found only some tracking cookies that I deleted.
But when I rebooted again, the problem reappeared.
Again, I ended some processes.
This time, I restored to a restore point just a day previous.
That cured my problem.
Only 1 time shortly thereafter my system successfully blocked another similar Trojan which was placed in the Virus vault.
I then went online & created a bootable AVG Rescue CD (actually a bootable USB Flash Drive) to use if it is ever needed in the future.
I then tested it. It again found some more tracking cookies that I again deleted.
But, it also found another Trojan for which I told it to rename it by adding the suffix _infected.arl (as suggested by AVG)
After, I rebooted the system normally, I did a search for any file with that suffix, but could not find any.
FINALLY THE QUESTIONS:
If I ever erroneously end a process, will it be added back when I reboot the system?
Is it possible that the AVG scan (using the bootable USB Flash Drive) merely saw the Trojan that was already in the Virus Vault & just did not rename it?