Am i right to be concerned about downloading?

i recently downloaded a file from a trusted site,which i thought would be ok to download,but it actually had a virus in its code

i am now very weary about downloading any file,what makes me even more concerned is that i scaned the computer with avg as avast crashed mid scan due to the infection,and after the scan it came back with no problems

2 minutes later my monitor went to sleep,and a restart was required,this was happening every few hours and as it wasnt hardware related it must of been the virus

should i still be concerned about downloading

note:the game i downloaded was "sonic riders"

cheers

Am i right to be concerned about downloading?vista

right click on the desktop and just check your setting incase it they changed maybe the monitor is on turn of every 2 minutes etc .

delete the game if u haven't already done so .

run virus scan again just to be sure

Am i right to be concerned about downloading?antispyware

Go to PC Pitstop.com and download Spyware Doctor. It will do a free scan and show the results. It will delete most of the bugs except the more serious ones....you have to pay to get rid of them!. However, it does work and you will be free of the viruses that the others couldnt get rid of. I know from personal experience. I thought it was con at first and wasted time trying others first. Its only downside is that when you let it run in the background, it slows everything up. You would be better to get it, use it, and then uninstall it. Then, when you need it again, download it once more, put your original serial number in (from first installation)and it will start again.
You would be stupid not to be wary of downloads. Free is not free if it comes with viruses.