Pop Up and Virus Problem?

Question

I have the Norton Antivirus,Norton Spam, and run the Yahoo AntiSpy every week.....sometimes when im doing something a pop up comes up that says this

Virus Alert-High Risk
Norton AntiVirus has detected a virus on your computer
Virus name- Downloader.Trojan
and this pops up 2

NSIS Error
The installer you are trying to use is corrupted or incomplete. This could be the result of a damaged disk.

what could be the problem?

Answer 1

A lot of times one antivirus software is not enough to protect you. Also, it may get disabled by some those virus. You can try using some online virus scanners to see if they can catch and remove those virus for you.

Answer 2

i think of your laptop is contaminated with a trojan. Trojans at the instant are not precisely viruses. yet get a terrific secure practices application. Get the two Kaspersky or form Micro, they are attainable at superb purchase. And Kaspersky is the superb on the marketplace and the FBI makes use of it alongside with my dad. At BB it expenditures approximately $60. form Micro is the 2d superb, i exploit it. At BB it expenditures approximately $40.