As soon as the message (Win 7 Home Security 2013) appears,close the window and use "System restore" to restore to an earlier day. Then use windows update to reinstall any system updates, and update VirusScan. This appears to have been successful on Lenovo laptap Windows 7 32-bit on 12-Jan-2013. Now set VirusScan Enterprise to prevent common programs from running from the temp folder. To install software, save downloaded executables to a different location than Temp and run them manually.
The bleeping link is probably fine, but it is rather complex.