First, you have to check your computer for spyware. If it responds too slowly or frequently crashes, then maybe it does have spyware. Remember though that other malicious programs also cause these problems, like viruses and worms. The best thing to do is to purchase an anti-virus program from your local store. There are also anti-virus programs offered on the Internet. It's not advisable though to download free anti-virus program because they can be virus themselves.
Some anti-virus programs also remove spyware, so that makes your work easier. Some, though, don't have this capability and you need to have a separate anti-spyware program. There are probably as many spyware and anti-spyware programs on the Internet today. If you think your computer has spyware, download an anti-spyware to remove it. However, don't be in a hurry to download the first anti-spyware you see. There are free downloadable anti-spyware programs on the Internet that are actually spyware programs themselves.
There are many websites that review different types of computer programs. These sites are the first place you should look. Not all of these websites are trustworthy, however, and you will have to use your better judgment before downloading any of the programs there.
You can also buy anti-spyware programs online. There are many websites that review computer programs, including anti-spyware. You can visit these websites to know which anti-spyware programs work best. Oftentimes, the best websites are those that are placed at the top of the list when you do a search on a powerful search engine. Don't go to less frequently visited review sites because they might have malicious programs.
Read the requirements of the program and the reviews of experts and users before clicking the download button. Usually, there are also links on the site for the company or person who wrote the program. Never be tempted to download free spyware programs from pop-up advertisements. There is a huge possibility that the program offered also contains spyware because the advertisers want to extract money or information from you.
Finally, look for anti-spyware programs that have frequent updates. Updates are necessary because hundreds of new spyware programs are made every day.