Your image... (looks like some of the Fake Anti-Virus screens.. haven't seen those in a while)
As Bearybear states... it is a REG key... and you apparently have some other "bug" on that pc.
What AV is / was running?
Assuming you are on WIndows XP or 7... boot to safe mode... check all of your startup entries in MSCONFIG (if it works)
Using Regedit... go to HKLM/Software/Microsoft/Wndows/Currentversion/ Run and see what is there...
to start with.. run it in safe mode... see what it finds..
You may need to find a boot disk you can use, and run AV tools from that... either a windows recovery disk, a linux distro.. or a Antivirus boot disk if you have that option
You may have a rootkit going... harder to fix.. but not impossible.
There is usually a lot of damage to the registry and files... depending on what malware it is. Sometimes a wipe and reinstall is easier than trying to fix it....Edited by cgipson1 - 3/26/14 at 2:49pm