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can you give us more details - what exactly has installed itself on your computer? A screen shot, file name etc?
There's lots of malware which claims to be legitimate security software - it might be that you've caught something like that.
It may be McAfee Security Scan Plus which is installed along with just about any Adobe product, and some others, as an optional extra..... unless you uncheck that option.
It helps keep some of those products free of charge with cross-advertising.
That is easily uninstalled via Control Panel > Programs and Features, or Add/Remove Programs, depending on your system.
If it's that, it is NOT malware.