Hi,
Can you please complete the following.
You are in fact infected with a Worm.
Can you right click the hijack-this icon and rename the shortcut to something other than Hijack-this eg the common example crusty.exe but don't rescan yet.
Can you also complete the other points in the 8 step process eg Malwarebytes and Superantispyware and post the logs.
Then can you re scan with Hijack-this.
As for your desktop it will either be due to the infection or your PC not responding. Just try a reboot.