I am using window7 home basic .i srinked my c drive 108 MB but it is not showing .it is unallocate.plz solve this problem

If you have unallocated space you need to create a partition in that space to use use it. Using Windows 7 Disk Management (doesn't always allow making changes): http://www.howtogeek.com/howto/windows-vista/resize-a-partition-for-free-in-windows-vista/ If you are unable to make changes to partitions using Disk Management below are partitioning programs you can use. Paragon Partition Manager (free): A good program for making general changes to hard drive partitions while Windows is running. Create, delete, format, and resize partitions with this program. It can also defragment, check file system integrity, and more. Be careful, re-sizing partitions is usually safe but errors can happen, and always backup anything important before modifying partitions on your hard drive. http://www.paragon-software.com/home/pm-express/download.html EASEUS Partition Master (free): Includes Partition Manager, Disk & Partition Copy Wizard and Partition Recovery Wizard for Windows 2000/XP/Vista/Windows 7 (32 bit and 64 bit). It allows users to Resize/Move Partition, Extend System Drive, Copy Disk & Partition, Merge Partition, Split Partition, Redistribute Free Space, Convert Dynamic Disk, Partition Recovery and more. Be careful, re-sizing partitions is usually safe but errors can happen, and always backup anything important before modifying partitions on your hard drive. http://www.partition-tool.com/personal.htm Have Questions About Installing Windows 7? FAQ - Common Windows 7 Installation Questions & Answers