3 Answers

Change your browser. It worked for me. I had Internet Explorer, for example. And it never worked well. So, I changed to Firefox. And it's faster and works well.

I would type ' [cleanup] in the [start] - [search programs] choose C drive.

After this is completed, type Defragment in the same search field under (start)

Install a good A/V (Anti virus) application  I use AVG, it's free and does a great job.

(with someone that knows computers, you need to also go to (msconfig) and shut down applications you are not using.   Do this with someone that knows the good from the bad, do not attempt this yourself.   This will speed you up 50+% if done right by someone that knows how. 

If your PC bogs down while you're working, check to see how many programs you have running. All programs take up system memory, which can have a huge impact on performance. In some cases, having multiple instances of a program (such as several open email messages) or multiple versions of a program type (more than one antivirus program) can use up memory. Respond to and close your messages right away and keep open only the programs that are necessary for the work you're currently doing—and you'll see a boost in speed.