What kinda specs are you running, can't believe it's the pictures on this forum that's causing the problems. This is how to clean your computer of any crap that's accumulated which should solve any problems:
I'd suggest doing a full virus and malware scan to begin.
Next open add-remove programs, uninstalling everything you don't use (make sure you understand what each one is first) this will help no end. Also delete any files you don't need (from my documents etc.)
Download and run a registry cleaner, this is the most important way of keeping your pc running smoothly.
Lastly defragmenting your hard drive. This will speed things up slightly, keeping all the files in order and easy to find for the os.
edit/ if you need help with any of the steps, just ask.