Check registry files:

Registry files control the software systems and programs on a computer. They can become damaged when you uninstall a program. Generally, uninstalling one program lead to a problem with another program that shared similar registry files. Therefore, use some good registry scanning software to determine if everything is working fine. There are lot of good registry scanners available in the market. Some of them are free wares. You can use any of these. (See my other posts on Registry Scanners: Abexo Registry Cleaner and Registry Cleaner Software).