“Warning: PC is at risk” is a threat detected by an Antispyware program WiniShield and Antispyware Webscanner. The full message read:
Attention: scan results
Warning: PC is at risk
During the scan AntiSpyware has detected 297 dangerous threats to be removed
It is highly recommended to remove all these unwanted threats from your PC right now!

Trojan.Win32.Splitter is reflected as “Virus Name” during a WiniShield rogue program scanning on computer. Trojan.Win32.Splitter may not really exists on system and this alert was used to deceived computer users to purchase the said rogue antivirus program.

“Half Lemon” is a threat included in the Infiltration Alert message being issued by Windows Antivirus Pro. The full message reads:

“[AOC] – Anvil of Crom virus Coded by Bumblebee/29a” is a text being displayed on computers that were infected with a variants of Win32:AOC family of virus. This will infect .exe and .dll libraries under Windows System directory.

Backdoor.Win32.Hupigon.fixn is a threat specified in a security alert issued by a fake program Windows Antivirus Pro to mislead computer users and obtain a copy of the said rogue application. The full message reads:
Windows Antivirus Pro has denied internet access of the program.
Internet Explorer is possible injected with worm Backdoor.Win32.Hupigon.fixn. This worm
attempts to send your personal information to [...]

“Warning! Running trial version!” is a popup alert message coming from a rogue program Privacy Center. This is an old rogue that was revived by its author and issuing new waves of alerts such as:
Warning! Running trial version!
The security of your computer has been compromised!
Now running trial version of the software!
Click here to purchase the [...]

“Internet attack attempt detected” is a fake Windows Taskbar alert that belongs to fake security program Windows Antivirus Pro. The alert was issued to deceive computer users and purchase the program. Full message reads:

“Warning: Infection is Detected” is a false popup messages from Windows Taskbar being displayed on computers infected with a rogue program Windows Antivirus Pro to mislead computer users. Full message reads:
Warning: Infection is Detected
Windows has found spyware infection on your computer! Click here to update your Windows antivirus software…

“svchost.exe has encountered a problem…” is a fake alert being issued by a rogue program Windows Antivirus Pro to deceive computer users. Full message reads:
svchost.exe has encountered a problem and needs to close. We are sorry for the inconvenience.
If you are in the middle of something, the information you were working on might be lost.
Please [...]

“Spyware Alarm! ” is a false alert being generated by a rogue program PC Security 2009 to mislead computer users about security status of their computers. The full message reads:
Spyware alarm!
Our scan has reported that pieces of malicious spyware code are present on your hard drive. To get rid of security threats, click here for [...]