1. Programs should NOT be “deleted”, they should be uninstalled (Start -> Settings -> Control Panel -> Add/Remove Programs).
2. You could clean temporary files, and empty Recycle Bin (Start -> Programs -> Accessories -> System Tools -> Disk Cleanup).
3. If looking for large files, use Search (Start -> Search -> For Files and Folders -> All Files and Folders -> What Size is it?)
4. If you have some extra time, open Windows Explorer (WIN+E), right-click each folder on your drive, select Properties, and check the size. This may help to narrow down large folders/files.

Features that may use excessive space:

Hibernation = Memory (RAM)
System Restore – up to 12% of hard drive.

WARNING ! ! ! : Always backup your hard drive prior to making major changes.
Note: System Restore is NOT a backup.

Good Luck!

P.S. Fresh Windows install with full MS Office, and all other programs (including large game installations) usually don’t take more than 15 GB on my fresh hard drive.

hey i have 18.6 gb of total available disc on my comp. where and how to get more?