my computer has a spyware on it called Security Tool how do i get rid of it?

i have to use my computer in safe mode because this Security Tool keeps popping up on the screen. i also cannot go on the internet in normal mode. i did not download this tool it just appeared. tell me what to do. thank you

Taiwan Opposition Says Computers Hacked by Chinese – ABC News

“Some of the computers have been planted with Trojan horse viruses so hackers could monitor … Citing the conclusions of a computer security firm, Huang says one source of Chinese attacks was the Kuala Lumpur, Malaysia, bureau of China’s official Xinhua …
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My friend put my flash drive into his security tool infected computer. Should I not use it anymore?

I tried putting it into an old computer and nothing, but I want to make sure it won’t spread through my flash drive.

Hacking and Computer Security?

Im interested in computer security, and the internet. And im wondering if any one have any resources or could tell me how hackers break into computer systems?