I need some help here to re-install Microsoft Management Console and Disk Defragmenter. I am facing a bit issue with the usage. It is not working fine. So I want to install the same back again. There are ample of things which failed to work and causing the problem. My system is having some bugs. I cannot format it completely. Through some online articles I found that the if you go with proper defragmentation you can gain a bit performance. But things are not like that.