Win 7 64 bit with good protection is taken over by a malware identified as System Tools. The first attack came suddenly yesterday with a warning alert that looked like Microsoft Security Essentials. The laptop was total controlled by this attack. I was fooled by a request to download by what I accepted as Microsoft Security Essentials and allowed the download. I could not open any thing on the computer and finally shut it down with a long hold down of switch.
When the computer was rebooted it quickly came under the control of the attacker almost demanding that I pay to download a program that was the only thing that could fix this virus attack. After a scan it reported 38 different virus plus. The desktop background was changed to a large warning sign that was warning that my wife and children were in danger from this computer problem.
I tried many things (MSE, CCleaner, Spybot, Task Manager) that would not open and were reported as being infected. Finally thought to try and fix the desktop background and was successful at doing this and got full access of the computer back. I changed to new background and it replaced the full page warning.
It is difficult to describe this more but I need help in dealing with getting rid of it. At every reboot it is there to deal with and just changing the desktop background gets rid of it till a reboot. I have run full scans with all programs mentioned and the computer is reported clean.