Computer It Loaded In 20 Seconds, Now It Takes Half An Hour?

At this point i knew exactly what had gone wrong and had a major panic attack, i thought i had lost all my precious files, which i had no backup of. Then i remembered when i first got the computer i had to burn something called Acer eRecovery manager to 3 CDs. I then loaded the CD via the Boot Menu, and from there chose to restore my system but still retain user data (rather than restore to factory settings). the 2 and a half hour procedure, i found that all of my documents had been saved. I immedietly rushed to the store and bought a external hard drive and backed up all of my documents.

Now, moving on to the problem. Well it actually a very easy problem to describe. My new computer is now 50x slower than what it used to be, and im not even exaggerating. When i first got the Computer it loaded in 20 seconds, now it takes half an hour. Before this happened, when i used to click on internet explorer it came up instantly, now when i click on it it takes a minute or so. The problem is that i literally just bought this computer, and it cost me alot of money. It worked brilliantly fast when i first got it, now after this my old laptop is even better than it.[CODE]