i recently logged onto facebook and clicked on a fanpage that one of my friend liked. it then took me to another page and all of a sudden i started getting pop ups. since i am using avast as an antivirus a notification popped up saying that there was a trojan virus blocked. i dont know which one it was. now when i log onto my desktop theres nothing but a black screen and the cursor. i would then have to do alt+ctrl+del and start a new task and open explorer.exe for the desktop to show up. some of the webpages that i open up using mozilla firefox wont show anything but text and links for example yahoo's homepage. now when i go on facebook i cant post or comment on anyone's page. i noticed that i could do everything normally on facebook when im using internet explorer. the yahoo home page works on ie too. i also tried doing a system restore but it doesnt seem to do anything. i know that there are some things that i should have done before i post a new topic here but its been awhile since i last used this. can you please help guide me through all the steps please. thank you.