Essay3 Thesis and Topic Sentences

Thesis:
The three main reasons for performance degradation are registry database corruption, file fragmentation, and malware.

Topic sentence for paragraph:

1. Registry database corruption is commonly an unsuspected cause of performance degradation.
2. File fragmentation is one of the major causes for performance degradation.
3. Malware is not only the biggest problem of performance degradation but can cause your computer to completely freeze or shutdown.