My laptop has been lagging a lot lately. After installing windows 8 it worked fine but now it's unbearable.

After installing Windows 8 it worked fine for a few days, but now it's unbearable.
I can't even watch videos or listen to music freely.
My taskbar keeps freezing for long periods.
And the sound has run slower by about 1 minute, for example, when I click
to watch a video on youtube, only 1 minute later does the audio start working, and it's the same for notifications as well.
I suspect this problem has something to do with my drivers.
When I got the notification about updating my Catalyst control center, I searched online for solutions and understood that I had to update my drivers.
When I went on Dell's website, it listed my
laptop model as "unsupported", so I kept looking for a solution.
Lots of things happened and I ended up downloading the "AMD Catalyst 12.6 Legacy for Windows 8".
I didn't really know what I was doing but everything still worked OK and there was no notification
about it so I just left it like that.

I screwed up big time, but I really want to keep using Windows 8.
Please help me!! :(

Anwsers to the Problem My laptop has been lagging a lot lately. After installing windows 8 it worked fine but now it's unbearable.

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Another Safe way to Repair the problem: My laptop has been lagging a lot lately. After installing windows 8 it worked fine but now it's unbearable.:

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How to Fix My laptop has been lagging a lot lately. After installing windows 8 it worked fine but now it's unbearable. with SmartPCFixer?

1. Download Error Fixer . Install it on your computer.  Click Scan, and it will perform a scan for your computer. The junk files will be shown in the scan result.

2. After the scan is done, you can see the errors and problems which need to be fixed.

3. The Repair part is finished, the speed of your computer will be much higher than before and the errors have been fixed. You can also use other functions in this software. Like dll downloading, junk file cleaning and print spooler error repair.

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