All I can say is that you seem to have reinfected yourself with something to be getting that to popup.
Try running tdsskiller to see if you have a rootkit.
Please download and run
TDSSkiller
When the program opens, click on change parameters, click on detect tdlfs file system and then click ok, click on the start scan button.
TDSSKiller will now scan your computer for the TDSS infection. When the scan has finished it will display a result screen stating whether or not the infection was found on your computer. If it was found it will display a screen similar to the one below.
To remove the infections simply click on the Continue button and TDSSKiller will attempt to clean them or remove them.
After trying to clean them it will pop up with the results of the scan and its actions.
Please reboot the system if asked to do so.
After running there will be a log that will be located at the root of your c:\ drive labeled tdsskiller with a series of numbers after it example, C:\TDSSKiller.2.4.7_23.07.2010_15.31.43_log.txt
Please open the log and copy and paste it back here.