Do you think that it is because I have the Adobe Master Collection CS5 installed? Intel Celeron 2.2 GHz processor, 2 GB RAM, 64-bit Windows operating system.
Your computer could also be infected with various kinds of malware and viruses. These will slow your system down like nothing else. http://www.makeuseof.com/tag/3-free-realtime-malware-protection-removal-tools/ this is a good article with some programs to remove malware from your computer. This, along with some of the suggestions the others put forward might help to speed your system up.
Was it always running slow or was this a slow process?
Hello, the links bellow will explain and show several tools/utilities that if used properly can help your computer stay in good shape.
Simply having software installed isn't likely to be the cause of bad performance (unless it is currently running), granted you have enough hard drive space.
Why do you have 64 bit Windows installed, with only 2GB's of RAM? 64 bit operating systems are only beneficial if you have more than 4GB's of ram, in fact in your case this is probably [at least] part of the issue.