PLEASE HELP ITS URGENT!!!! (regarding Firefox help)?

Hi installed spy sweeper and then uninstall it as it was getting my windows to hang and so i installed counterspy and then after installing it, i opened Firefox and went directly to youtube to sign. The page was not getting open when i just enter the URL and pressed enter for a sec the blue bar ,in the down right hand corner, got full and when i saw to left it said done while the page was not opened not even a single thing appeared. After reloading it for 15 tries! i got on that page but with no style when in view then in page style it was selected basic page style. All the things where in one line down.. after then i click on sign in. I got the page open (not with style) i entered correct username and pword and the click sign in but when i saw in the left bottom corner of firefox, it was written 'waiting for www.youtube.com...' but after waiting 5 hrs! i was not signed in. This is not only on youtube but all other sites, they get page in no style and all sign in or login sites i cannot login. 1 more thing, the connection i have is connected t 2 computer, one mine and other is a laptop. When i login on youtube or any site on that laptop i get in but not on that pc. And in that pc when i open IE i get logged in, in all sites, but ewww it has really bad style and graphics so i hate IE. After all this things there is also one more thing and that is when i click on any download link to download the thing like on rapidshare when i want to download a file I click on free user but nothing happens the page remains there only showing the same messgae " waiting________". Not only that when i go on some other pages the same thing happens that i have to retry 15 times and get that page infront of me. I m really sad so please someone help it will be really greatful if u help me out. I tried cleaning my firefox's cache and cookie and everything and even reinstall it with selecting the option remove everything thats in firefox profile but still nothing good =''((((